LINK / CITE ADD TO WORD LIST. noun. The definition of availability is whether someone or something can be accessed or used. An example of availability is when a classmate can meet to discuss a project on a certain date.
excuse - a defense of some offensive behavior or some failure to keep a promise etc.; he kept finding excuses to stay; every day he had a new alibi for not getting a job; his transparent self-justification was unacceptable
(of a proof) in strict logical form with a justification for every step. (of a calculation) correct in form; made with strict justification for every step. (of a calculation, derivation, representation, or the like) of or relating to manipulation of symbols without regard to their meaning.