Real Dictionary

verb
countable noun: A verb is a word such as ' sing', ' feel', or ' die' which is used with a subject to say what someone or something does or what happens to them, or to give information about them.

verb in American English
any of a class of words expressing action, existence, or occurrence, or used as an auxiliary or copula, and usually constituting the main element of a predicate (Ex.: give, build, run, be, happen, do, have, would, seem)
noun: any member of a class of words that are formally distinguished in many languages, as in English by taking the past ending in -ed, that function as the main elements of predicates, that typically express action, state, or a relation between two things, and

verb in British English
noun: (in traditional grammar) any of a large class of words in a language that serve to indicate the occurrence or performance of an action, the existence of a state or condition, etc. In English, such words as run, make, do, and the like are verbs