valid

val·id  (vld)

adj.

1. Well grounded; just: a valid objection.

2. Producing the desired results; efficacious: valid methods.

3. Having legal force; effective or binding: a valid title.

4. Logic

a. Containing premises from which the conclusion may logically be derived: a valid argument.

b. Correctly inferred or deduced from a premise: a valid conclusion.

5. Archaic Of sound health; robust.

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[French valide, from Old French, from Latin validus, strong, from valre, to be strong; see wal- in Indo-European roots.]

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va·lidi·ty, valid·ness n.

valid·ly adv.

Synonyms: valid, sound², cogent, convincing
These adjectives describe assertions, arguments, conclusions, reasons, or intellectual processes that are persuasive because they are well founded. What is valid is based on or borne out by truth or fact or has legal force: a valid excuse; a valid claim.
What is sound is free from logical flaws or is based on valid reasoning: a sound theory; sound principles.
Something cogent is both sound and compelling: cogent testimony; a cogent explanation.
Convincing implies the power to dispel doubt or overcome resistance or opposition: convincing proof.

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valid [ˈvælɪd]

adj

1. having some foundation; based on truth

2. (Law) legally acceptable a valid licence

3. (Law)

a.  having legal force; effective

b.  having legal authority; binding

4. having some force or cogency a valid point in a debate

5. (Philosophy / Logic) Logic (of an inference or argument) having premises and conclusion so related that whenever the former are true the latter must also be true, esp (formally valid) when the inference is justified by the form of the premises and conclusion alone. Thus Tom is a bachelor; therefore Tom is unmarried is valid but not formally so, while today is hot and dry; therefore today is hot is formally valid Compare invalid² [2]

6. Archaic healthy or strong

[from Latin validus robust, from valēre to be strong]

validly  adv

validity  [vəˈlɪdɪtɪ], validness n

Thesaurus

Adj.	1.	valid - well grounded in logic or truth or having legal force; "a valid inference"; "a valid argument"; "a valid contract" legitimate - of marriages and offspring; recognized as lawful reasonable, sensible - showing reason or sound judgment; "a sensible choice"; "a sensible person" invalid - having no cogency or legal force; "invalid reasoning"; "an invalid driver's license"
	2.	valid - still legally acceptable; "the license is still valid" unexpired - not having come to an end or been terminated by passage of time; "elected to fill the senator's unexpired term"; "an unexpired driver's license"

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valid

adjective

1. sound, good, reasonable, just, telling, powerful, convincing, substantial, acceptable, sensible, rational, logical, viable, credible, sustainable, plausible, conclusive, weighty, well-founded, cogent, well-grounded Both sides have made valid points.
sound weak, false, unacceptable, spurious, unrealistic, bogus, untrue, sham, unfounded, illogical, baseless, unrecognized, fallacious

2. legal, official, legitimate, correct, genuine, proper, in effect, authentic, in force, lawful, bona fide, legally binding, signed and sealed For foreign holidays you will need a valid passport.
legal illegal, unofficial, unlawful, invalid, inoperative

Translations

valid [ˈvælɪd] ADJ

1. [argument, point, question] → válido; [excuse, claim, objection] → válido, legítimo
that argument is not valid → ese argumento no es válido or no vale

2. [ticket, passport, licence, contract] → válido, valedero
a ticket valid for three months → un billete válido or valedero para tres meses
that ticket is no longer valid → ese billete ya no vale or ha caducado ya

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valid [ˈvælɪd] adj

[passport] → en cours de validité; [ticket, contract] → valable
You will need a valid passport → Il vous faudra un passeport en cours de validité.
This ticket is valid for three months → Ce billet est valable trois mois.

[argument, point, question, claim, reason] → valable; [excuse] → valable

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valid

adj

ticket, passport → gültig (also Comput); (Jur) document, marriage → (rechts)gültig; contract → bindend, rechtsgültig; claim → berechtigt, begründet; no longer valid (ticket) → nicht mehr gültig; passport also → abgelaufen

argument, reasoning, interpretation → stichhaltig; excuse, reason → triftig, einleuchtend; objection → berechtigt, begründet; this argument isn’t valid (in itself) → dieses Argument ist nicht stichhaltig; (= not relevant) → dieses Argument ist nicht zulässig or gilt nicht; is it valid to assume this? → ist es zulässig, das anzunehmen?; that’s a very valid point → das ist ein sehr wertvoller Hinweis

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valid [ˈvælɪd] adj (ticket, document, excuse) → valido/a; (claim, objection) → giustificato/a

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valid

adj valid [ˈvӕlid]

1 (of reasons, arguments etc) true; reasonable or acceptable That is not a valid excuse. geldig شَرْعي، قانوني، مَقْبول обоснован pádný, přesvědčivý gyldig stichhaltig έγκυρος, βάσιμος válido põhjendatud, paikapidav معتبر؛ موجه pätevä valable הֶגיוֹנִי प्रभावशाली valjan megalapozott bisa diterima gildur, réttmætur valido 妥当な 정당한 įtikinamas pamatots; ticams; attaisnojošs sah geldig gyldig, holdbar, velbegrunnet przekonywający válido valabil обоснованный presvedčivý tehten validan tungt vägande, välgrundad, giltig ซึ่งมีเหตุผล mantıklı, kabul edilebilir 正當的，合理的 переконливий; обґрунтований درست، قابل قبول đúng đắn 正当的

2 legally effective; having legal force He has a valid passport. geldig ساري المَفْعول със законно основание platný gyldig gültig έγκυρος, που ισχύει válido kehtiv قانونی lainvoimainen valide תָקֵף वैध pravovaljan érvényes sah í gildi valido 有効な 법적으로 유효한 galiojantis likumīgs sah geldig (retts)gyldig, lovlig ważny válido valid, valabil действительный platný veljaven validan giltig ถูกต้องตามกฎหมาย geçerli 有效的 дійсний, чинний قانوني، باظابطہ có hiệu lực 有效的

adv validly

geldig بصورَةٍ شَرعِيَّه، بصورَةٍ سارِيَة المَفعول действително pádně gyldigt gültig έγκυρα válidamente kehtivalt بطور معتبر pätevästi valablement כַּחוֹק उचित, रीति से, प्रमाण पूर्वक, न्यायपूर्वक, कानून के ढंग से pravovaljano érvényesen secara sah á gildan hátt, réttilega validamente 有効に 법적으로 유효하게, 정당한 절차로 įtikinamai likumīgs; spēkā esošs; derīgs secara sah geldig gyldig; velbegrunnet przekonywająco validamente valabil обоснованно pádne veljavno validno giltigt อย่างมีเหตุผล geçerli olarak 有效地，正當地 на законних підставах درستگي کے ساتھ hợp lệ, đúng đắn 有效地，正当地

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valid → مَشروع přesvědčivý gyldig berechtigt έγκυρος válido voimassaoleva valide vrijedan valido 正当な 정당한 geldig gyldig ważny válido действительный giltig มีเผลบังคับใช้ geçerli có cơ sở 有效的