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
Definition of excuse for Students. 1  1 : a reason given for having done something wrong What's your excuse for being so late? 2  2 : something that is an acceptable reason for or justifies There is no excuse for bad behavior. 3  3 : a reason for doing something That's a good excuse for a party.