Valid

Origin

From French valide ("healthy, sound, in good order"), from Latin validus, from valeō("I am strong, I am healthy, I am worth") + -idus, from Proto-Indo-European *wal ("be strong").

Full definition of valid

Adjective

1. Well grounded or justifiable, pertinent.
• 2012, Jan Sapp, Race Finished, Few concepts are as emotionally charged as that of race. The word conjures up a mixture of associations—culture, ethnicity, genetics, subjugation, exclusion and persecution. But is the tragic history of efforts to define groups of people by race really a matter of the misuse of science, the abuse of a valid biological concept?
2. I will believe him as soon as he offers a valid answer.
3. Acceptable, proper or correct.A valid format for the date is MM/DD/YY.Do not drive without a valid license.
4. Related to the current topic, or presented within context, relevant.
5. (logic)   A formula or system that evaluates to true regardless of the input values.
6. (logic)   An argument whose conclusion is always true whenever its premises are true.An argument is valid if and only if the set consisting of both (1) all of its premises and (2) the contradictory of its conclusion is inconsistent.

Synonyms

• (in logic: formula which evaluates to true regardless of its input values) tautological

Antonyms

• invalid

Hyponyms

• (in logic: argument whose conclusion is always true whenever its premises are all true) sound

Related terms

• validate
• validation
• validator