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
A legal excuse for the performance or nonperformance of a particular act that is the basis for exemption from guilt. A classic example is the excuse of Self-Defense offered as justification for the commission of a murder.