valid

[ val-id ]
/ ˈvæl ɪd /

adjective

sound; just; well-founded: a valid reason.
producing the desired result; effective: a valid antidote for gloom.
having force, weight, or cogency; authoritative.
legally sound, effective, or binding; having legal force: a valid contract.
Logic. (of an argument) so constructed that if the premises are jointly asserted, the conclusion cannot be denied without contradiction.
Archaic. robust; well; healthy.

Origin of valid

1565–75; < Latin validus strong, equivalent to val(ēre) to be strong + -idus -id4

SYNONYMS FOR valid

3 substantial, cogent.
5 logical, convincing.

OTHER WORDS FROM valid

WORDS THAT MAY BE CONFUSED WITH valid

valet valid

Words nearby valid

valetudinary, valgus, valhalla, valiancy, valiant, valid, validate, validity, valinda, valine, valinomycin

Example sentences from the Web for non-valid

British Dictionary definitions for non-valid

valid
/ (ˈvælɪd) /

adjective

having some foundation; based on truth
legally acceptable a valid licence
  1. having legal force; effective
  2. having legal authority; binding
having some force or cogency a valid point in a debate
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)
archaic healthy or strong

Derived forms of valid

validly, adverb validity (vəˈlɪdɪtɪ) or validness, noun

Word Origin for valid

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