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1. Any of various devices used to fasten something securely.
2. Biology An organ or structure of attachment, especially the basal, rootlike formation by which certain seaweeds or other algae are attached to a substrate.
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.


a. the act of gripping strongly
b. such a grip
2. (Mechanical Engineering) any device used to secure an object, such as a hook, clamp, etc
3. (Botany) the organ of attachment of a seaweed or related plant
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈhoʊldˌfæst, -ˌfɑst)

1. something used to hold or secure a thing in place.
2. any of several rootlike or suckerlike parts of a plant or fungus serving for attachment.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.holdfast - restraint that attaches to something or holds something in placeholdfast - restraint that attaches to something or holds something in place
bellyband - a strap around the belly of a draft animal holding the shafts of a wagon
buckle - fastener that fastens together two ends of a belt or strap; often has loose prong
button - a round fastener sewn to shirts and coats etc to fit through buttonholes
carabiner, karabiner, snap ring - an oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes
catch - a fastener that fastens or locks a door or window
clasp - a fastener (as a buckle or hook) that is used to hold two things together
cleat - a fastener (usually with two projecting horns) around which a rope can be secured
clinch - the flattened part of a nail or bolt or rivet
clip - any of various small fasteners used to hold loose articles together
clothes peg, clothes pin, clothespin - wood or plastic fastener; for holding clothes on a clothesline
corrugated fastener, wiggle nail - a small strip of corrugated steel with sharp points on one side; hammered across wood joints in rough carpentry
cottar, cotter - fastener consisting of a wedge or pin inserted through a slot to hold two other pieces together
cringle, grommet, grummet, loop, eyelet - fastener consisting of a metal ring for lining a small hole to permit the attachment of cords or lines
dowel, dowel pin, joggle - a fastener that is inserted into holes in two adjacent pieces and holds them together
stopping, fillet - fastener consisting of a narrow strip of welded metal used to join steel members
hook and eye - a kind of fastener used on clothing
knot - any of various fastenings formed by looping and tying a rope (or cord) upon itself or to another rope or to another object
lashing - rope that is used for fastening something to something else; "the boats were held together by lashings"
linkup, tie-in, link, tie - a fastener that serves to join or connect; "the walls are held together with metal links placed in the wet mortar during construction"
lock - a fastener fitted to a door or drawer to keep it firmly closed
locker - a fastener that locks or closes
nail - a thin pointed piece of metal that is hammered into materials as a fastener
nut and bolt - a fastener made by screwing a nut onto a threaded bolt
paper fastener - a fastener for holding a sheet of paper in place
pin - a small slender (often pointed) piece of wood or metal used to support or fasten or attach things
constraint, restraint - a device that retards something's motion; "the car did not have proper restraints fitted"
screw - a fastener with a tapered threaded shank and a slotted head
seal - fastener that provides a tight and perfect closure
seal, sealing wax - fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters
slide fastener, zip fastener, zipper, zip - a fastener for locking together two toothed edges by means of a sliding tab
press stud, snap fastener, snap - a fastener used on clothing; fastens with a snapping sound; "children can manage snaps better than buttons"
toggle - a fastener consisting of a peg or pin or crosspiece that is inserted into an eye at the end of a rope or a chain or a cable in order to fasten it to something (as another rope or chain or cable)
toggle bolt - a fastener consisting of a threaded bolt and a hinged spring-loaded toggle; used to fasten objects to hollow walls
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
"Bear in mind then, that Brag is a good dog, but Holdfast is a better.
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Tyrion tells them they should be with the other nobles in Maegor's holdfast. Joffrey walks in and calls for Sansa.
At first glance The Water Cure seems to be in conversation with Margaret Atwood's The Handmaid's Tale, or 1970s feminist dystopias like Suzy McKee Charnas's Holdfast Chronicles or Sheri S.
Shani Wood from the City of Holdfast Bay said the bags were made in Japan from 100 per cent organic matter, including "98 per cent corn starch".
In each quadrant, the maximum diameter of the holdfast was measured and used to estimate the size and weight of the plant.
They have adapted to the underwater life by hiding in barnacle shells, corals or kelp holdfast during high tide and breathe by building air chambers from silk.
They have adapted to living underwater by finding small pockets of air under barnacle shells, corals or kelp holdfast during high tide.
Although Luna pubescent wheatgrass was the forage that performed best in the short term (mean cover = 50.8%, SE = 6.05), Holdfast hardinggrass performed the best overall (mean cover = 51.9%, SE = 10.7).
At the other end of the creature was star-shaped organ called a holdfast, which gripped the seafloor.
The family Aspidogastridae Poche, 1907 includes three subfamilies, containing Cotylaspidinae Chauhan, 1954 which comprises three genera with species possessing a ventral holdfast with three longitudinal rows (two marginal and one central) of alveoli (Rohde, 2002).
The rod-shaped, unsegmented, or partly segmented parasitic stage lernaeid female is anchored, with the aid of a specialized holdfast organ, to the host skin or buccal mucosa.