Exigence is a term that refers to an urgent NEED or demand. It is often used in the context of a situation that requires immediate attention or action. The term is related to the words EMERGENCY and NEED, which both have similar meanings. EMERGENCY is defined as a serious, unexpected, and often dangerous situation requiring immediate action, while NEED is defined as a requirement or necessity for something. All three terms are used to describe situations that require quick and decisive action.