adjective val·id \ ˈva-ləd \
|Updated on: 13 Aug 2018

Definition of valid

1 : having legal efficacy or force; especially : executed with the proper legal authority and formalities
  • a valid contract
2 a : well-grounded or justifiable : being at once relevant and meaningful
  • a valid theory
b : logically correct
  • a valid argument
  • valid inference
3 : appropriate to the end in view : effective
  • every craft has its own valid methods
4 of a taxon : conforming to accepted principles of sound biological classification


play \və-ˈli-də-tē, va-\ noun


play \ˈva-ləd-lē\ adverb

Examples of valid in a Sentence

  1. There is no valid reason to proceed with the change.

  2. Her objections were completely valid.

  3. You make a valid point.

  4. You must present valid identification.

  5. Their marriage is not legally valid.

  6. The agreement is no longer valid under international law.

Recent Examples of valid from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'valid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of valid

borrowed from Middle French or Latin; Middle French valide "in good health, having legal force," borrowed from Latin validus "in good health, robust, potent, having legal authority," adjective derivative from the base of valēre "to have strength, be well" — more at wield

Synonym Discussion of valid

valid, sound, cogent, convincing, telling mean having such force as to compel serious attention and usually acceptance. valid implies being supported by objective truth or generally accepted authority.
    • a valid reason for being absent
    • a valid marriage
sound implies a basis of flawless reasoning or of solid grounds.
    • a sound proposal for reviving the economy
cogent may stress either weight of sound argument and evidence or lucidity of presentation.
    • the prosecutor's cogent summation won over the jury
convincing suggests a power to overcome doubt, opposition, or reluctance to accept.
    • a convincing argument for welfare reform
telling stresses an immediate and crucial effect striking at the heart of a matter.
    • a telling example of bureaucratic waste

VALID Defined for English Language Learners


Definition of valid for English Language Learners

  • : fair or reasonable

  • : acceptable according to the law

VALID Defined for Kids


adjective val·id \ ˈva-ləd \

Definition of valid for Students

1 : having legal force or effect
  • a valid driver's license
2 : based on truth or fact
  • She had a valid excuse for missing practice.



Law Dictionary


adjective val·id \ ˈva-ləd \

legal Definition of valid

1 : having legal efficacy or force
  • a valid license
; especially : executed with proper authority and form
  • a valid contract
  • a valid search
2 : having a legitimate basis : justifiable
  • a valid reason for terminating the employee
3 : appropriate to the end in view


play \və-ˈli-də-tē\ noun



Seen and Heard

What made you want to look up valid? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!


fullness to the point of excess

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet-pasta-spelling-help
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Syn City

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!