(grammar) A word that indicates an action, event, or state of being.
The word “speak” is an English verb.
(obsolete) Any word; a vocable.
(figurative) An action as opposed to a trait or thing.
Kindness is a verb, not an adjective. You're only kind if you do kind things.
(programming) A named command that performs a specific operation on an object.
verb
(transitive, nonstandard, colloquial) To use any word that is or was not a verb (especially a noun) as if it were a verb.
Haig, in congressional hearings before his confirmatory, paradoxed his auditioners by abnormalling his responds so that verbs were nouned, nouns verbed and adjectives adverbised. He techniqued a new way to vocabulary his thoughts so as to informationally uncertain anybody listening about what he had actually implicationed... .
(linguistics, social sciences) Used as a placeholder for any verb.