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1. Having boundaries; enclosed: a closed corridor between the two buildings.
2. Blocked or barred to passage or entry: a closed port.
3. Explicitly limited; restricted: closed membership.
4. Self-contained or self-sufficient: a closed relationship.
5. Barred to the public; conducted in secrecy: a closed session of the judiciary committee.
6. Mathematics
a. Of or relating to a curve, such as a circle, having no endpoints.
b. Of or relating to a surface having no boundary curves.
c. Of or relating to an interval containing both its endpoints.
d. Characterized by or possessing the property by which an operation acting on an element in a set produces an element within the set.
7. Computers Of or relating to a file that cannot be accessed.
8. Electricity Allowing electricity to flow or pass: a closed switch.
9. Linguistics Ending in a consonant: a closed syllable.
10. Sports
a. Having the forward foot closer to the intended point of impact with the ball than the rear foot: a closed batting stance.
b. Held or swung with the top or outer edge of the striking face pointing slightly closer to the objective than the lower or inner edge: The club face was closed when it hit the ball, causing a hook.
11. Physics
a. Of or relating to a closed system.
b. Of or relating to a closed universe.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. blocked against entry; shut
2. restricted; exclusive
3. not open to question or debate
4. (Hunting) (of a hunting season, etc) close
5. (Mathematics) maths
a. (of a curve or surface) completely enclosing an area or volume
b. (of a set) having members that can be produced by a specific operation on other members of the same set: the integers are a closed set under multiplication.
6. (Phonetics & Phonology) phonetics
a. denoting a syllable that ends in a consonant
b. another word for close121
7. not open to public entry or membership: the closed society of publishing.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



1. having or forming a boundary or barrier: a closed door.
2. brought to a close; concluded: a closed incident.
3. not public; restricted; exclusive: a closed meeting.
4. not open to new ideas or arguments.
5. self-contained; independent or self-sufficient: a closed system.
6. (of a syllable) ending with a consonant. Compare open (def. 25b).
a. (of a set in which a combining operation is defined) such that performing the operation between members of the set produces a member of the set, as multiplication in the set of integers.
b. (of a function or operator) having as its graph a closed set.
c. (of a curve) not having endpoints.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


1. 'close' or 'shut'

If you close /kləʊz/ something such as a door, you move it so that it covers or fills a hole or gap.

He opened the door and closed it behind him.

You can also say that you shut something such as a door. There is no difference in meaning. The past tense and -ed participle of shut is shut.

I shut the door quietly.

Both closed and shut can be adjectives used after a linking verb.

All the other downstairs rooms are dark and the shutters are closed.
The windows were all shut.

You can use either close or shut to say that work or business stops for a short time in a shop or public building.

Many libraries close on Saturdays at 1 p.m.
What time do the shops shut?
2. 'close' or 'closed' only

Only closed can be used in front of a noun. You can talk about a closed window, but not a 'shut' window.

He listened to her voice coming faintly through the closed door.

You can say that a road, border, or airport is closed.

The border was closed without notice around midnight.

Don't say that a road, border, or airport 'is shut'.

Be Careful!
Don't confuse the verb close with the adjective close /kləʊs/. If something is close to something else, it is near to it.

Collins COBUILD English Usage © HarperCollins Publishers 1992, 2004, 2011, 2012
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.closed - not open or affording passage or access; "the many closed streets made travel difficult"; "our neighbors peeped from behind closed curtains"
obstructed - shut off to passage or view or hindered from action; "a partially obstructed passageway"; "an obstructed view"; "justice obstructed is not justice"
shut, unopen, closed - not open; "the door slammed shut"
sealed - closed or secured with or as if with a seal; "my lips are sealed"; "the package is still sealed"; "the premises are sealed"
open - affording free passage or access; "open drains"; "the road is open to traffic"; "open ranks"
2.closed - (set theory) of an interval that contains both its endpoints
math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
open - (set theory) of an interval that contains neither of its endpoints
3.closed - not openclosed - not open; "the door slammed shut"  
closed - not open or affording passage or access; "the many closed streets made travel difficult"; "our neighbors peeped from behind closed curtains"
4.closed - used especially of mouth or eyes; "he sat quietly with closed eyes"; "his eyes were shut against the sunlight"
opened, open - used of mouth or eyes; "keep your eyes open"; "his mouth slightly opened"
5.closed - requiring union membership; "a closed shop"
union - of trade unions; "the union movement"; "union negotiations"; "a union-shop clause in the contract"
6.closed - with shutters closed
shuttered - provided with shutters or shutters as specified; often used in combination; "a church with a shuttered belfry and spire"; "green-shuttered cottages"
7.closed - not open to the general public; "a closed meeting"
restricted - subject to restriction or subjected to restriction; "of restricted importance"
8.closed - not having an open mindclosed - not having an open mind; "a closed mind unreceptive to new ideas"
unreceptive - not receptive
9.closed - blocked against entry; "a closed porch"
enclosed - closed in or surrounded or included within; "an enclosed porch"; "an enclosed yard"; "the enclosed check is to cover shipping and handling"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


1. shut, locked, sealed, fastened Her bedroom door was closed.
shut open, unlocked, ajar, unfastened, unsealed, unclosed
2. shut down, out of business, out of service The airport shop was closed.
3. exclusive, select, restricted No-one was admitted to this closed circle of elite students.
4. finished, over, ended, decided, settled, concluded, resolved, terminated I now consider the matter closed.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002
đóng kín


A. ADJ (gen) → cerrado; [hearing, meeting] → a puerta cerrada
her eyes were closedtenía los ojos cerrados
sociology is a closed book to mela sociología es un misterio para mí
the case is closed (Jur) → el caso está cerrado
behind closed doors (fig) → a puerta cerrada
to have a closed mindser de miras estrechas, ser de mente cerrada
it's closed on Sundayslos domingos está cerradocierra los domingos
the road is closed to trafficla carretera está cerrada al tráfico
the door was closed to us (fig) → para nosotros las puertas estaban cerradas
B. CPD closed primary N (US) (Pol) elección primaria reservada a los miembros de un partido
closed season N (Hunting, Fishing) → veda f (Ftbl, Rugby) → temporada f de descanso (de la liga de fútbol)
closed session N (Jur) → sesión f a puerta cerrada
in closed sessionen sesión a puerta cerrada
closed shop N (Ind) empresa con todo el personal afiliado obligatoriamente a un solo sindicato
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


[ˈkləʊzd] adj
[shop] → fermé(e)
The bank's closed → La banque est fermée.
[road] → fermé(e) à la circulationclosed-circuit television [ˌkləʊzdˈsɜːrkɪt] ntélévision f en circuit fermé closed-circuit television cameraclosed-circuit television camera ncaméra f de surveillanceclose-down [ˈkləʊzdaʊn] n [shop, business] → fermeture f (définitive)closed shop n entreprise qui n'emploie que des travailleurs syndiquésclose-fisted [ˌkləʊsˈfɪstɪd] adjpingreclose-fitting [ˌkləʊsˈfɪtɪŋ] adj [clothes] → ajusté(e)close-knit [ˌkləʊsˈnɪt] adj [family, community] → très uni(e)
Collins English/French Electronic Resource. © HarperCollins Publishers 2005


closed circuit
closed-circuit television
ninterne Fernsehanlage; (for supervision) → Fernsehüberwachungsanlage f
adj meeting, sessionhinter verschlossenen Türen


closed primary
n (US Pol) Vorwahl mit Fraktionszwang, bei der nur Mitglieder der eigenen Partei gewählt werden können
closed scholarship
closed season
nSchonzeit f
closed session
closed set
n (Math) → abgeschlossene Menge
closed shop
nClosedshop m; we have a closedwir haben Gewerkschaftszwang
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007


[kləʊzd] adjchiuso/a
sociology is a closed book to me → per me la sociologia è un mistero
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995


مُغْلَق uzavřený lukket geschlossen κλειστός cerrado suljettu fermé zatvoren chiuso 閉まっている 닫힌 gesloten lukket zamknięty fechado замкнутый stängd ปิดไม่รับสิ่งใหม่ kapalı đóng kín 关闭的
Multilingual Translator © HarperCollins Publishers 2009


a. cerrado-a;
___ circuit televisiontelevisión en circuito ___;
___ ecological systemsistema ecológico ___.
English-Spanish Medical Dictionary © Farlex 2012
References in classic literature ?
It was a matter of masculine pride that he should walk with them, and he had done so in fair seeming; but women had remained to him a closed book, and he preferred a game of solo or seven-up any time.
She certainly looked very charming as she strolled, lingering along under the budding horse-chestnut trees that stretched their long arms over the park-palings; with her closed book in one hand, and in the other a graceful sprig of myrtle, which served her as a very pretty plaything; her bright ringlets escaping profusely from her little bonnet, and gently stirred by the breeze, her fair cheek flushed with gratified vanity, her smiling blue eyes, now slyly glancing towards her admirer, now gazing downward at her myrtle sprig.
The material achievement and progress of the West was a closed book to her; nor could the West open the book.
His thoughts were a closed book. Superficially, he was all that she could have wished.
"This transaction further confirms that our business is well positioned to benefit from the significant and structurally growing market opportunity in closed books," ReAssure Chief Executive Officer Mark Hodges said.
ReAssure buys and administers closed books for companies and has more than 4.3 million policies, with its customers' investments totalling more than PS68bn.
ReAssure buys and administers closed books of business from other companies and has more than 4.3m policies and looks after investments of more than PS68.7 billion for its customers.