Transient is an adjective used to describe something that is temporary or lasts only for a short time. It can also be used as a noun to refer to a person who moves from place to place, such as a homeless person. In audio production, transients refer to the short burst of energy that you hear at the beginning of a sound wave. Some synonyms for transient include evanescent, transitory, and fugitive. Examples of how to use the word transient in a sentence include "The city has a large transient population" and "The beauty of the sunset was transient, lasting only a few minutes".