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.

VALID definition: 1. based on truth or reason; able to be accepted: 2. A ticket or other document is valid if it is…. Learn more.

VALID definition: sound; just; well-founded. See examples of valid used in a sentence.

Definition of valid adjective from the Oxford Advanced Learner's Dictionary. that is legally or officially acceptable. Do you have a valid passport? He bought a bus pass valid for one month. They have a …

These adjectives describe assertions, arguments, conclusions, reasons, or intellectual processes that are persuasive because they are well founded. What is valid is based on or borne out by truth or fact …

(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 …

Dec 14, 2025 · 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.

valid, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Something that is valid is important or serious enough to make it worth saying or doing. Most designers share the unspoken belief that fashion is a valid form of visual art.

Valid definition: Well grounded; just.