[ val-id ]
See synonyms for: validvalidness on

  1. sound; just; well-founded: a valid reason.

  2. producing the desired result; effective: a valid antidote for gloom.

  1. having force, weight, or cogency; authoritative.

  2. legally sound, effective, or binding; having legal force: a valid contract.

  3. Logic. (of an argument) so constructed that if the premises are jointly asserted, the conclusion cannot be denied without contradiction.

  4. Archaic. robust; well; healthy.

Origin of valid

First recorded in 1565–75; from Latin validus “strong,” from val(ēre) “to be strong” + -idus -id4;cf. prevail

Other words for valid

Other words from valid

  • val·id·ly, adverb
  • val·id·ness, noun
  • non·val·id, adjective
  • non·val·id·ly, adverb
  • non·val·id·ness, noun
  • pre·val·id, adjective
  • pre·val·id·ly, adverb
  • quasi-valid, adjective
  • qua·si-val·id·ly, adverb

Words that may be confused with valid

Words Nearby valid Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use valid in a sentence

British Dictionary definitions for valid


/ (ˈvælɪd) /

  1. having some foundation; based on truth

  2. legally acceptable: a valid licence

    • having legal force; effective

    • having legal authority; binding

  1. having some force or cogency: a valid point in a debate

  2. 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 invalid 2 (def. 2)

  3. archaic healthy or strong

Origin of valid

C16: from Latin validus robust, from valēre to be strong

Derived forms of valid

  • validly, adverb
  • validity (vəˈlɪdɪtɪ) or validness, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012