valid
/ˈvælɪd/ adjective
- adjective Well-grounded or justifiable, pertinent. “I will believe him as soon as he offers a valid answer.”
- adjective Acceptable, proper or correct; in accordance with the rules. “A valid format for the date is DD/MM/YY.”
- adjective Related to the current topic, or presented within context, relevant.
- adjective (logic) Of a formula or system: such that it evaluates to true regardless of the input values.
- adjective (logic) Of 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.”
- adjective (Christianity, theology) Genuine - as distinguished from efficient or regular - sacrament.
Synonyms
arguable groundly proper warrantable legit legitimate applicable germane apposite apt ad rem well-placed felicitous in point material on point on-topic pertinent relevant salient
Antonyms
invalid nonvalid disallowed illegitimate illicit nonstandard nude null null and void unvalid void
Etymology
Borrowed from Middle French valide (“healthy, sound, in good order”), from Latin validus, from valeō (“to be strong, to be healthy, to be worth”) + -idus, from Proto-Indo-European *h₂welh₁- (“be strong”).
Webster’s 1913
- adjective Strong; powerful; efficient. [Obs.] "Perhaps more valid arms . . .
- adjective Having sufficient strength or force; founded in truth; capable of being justified, defended, or supported; not weak or defective; sound; good; efficacious; as, a valid argument; a valid objection.
Etymology [F. valide, F. validus strong, from valere to be strong. See Valiant.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “valid”, CC BY-SA 4.0. Details