a word or phrase used to describe a thing or to express a concept, especially in a particular kind of language or branch of study:

a fixed or limited period for which something, e.g., office, imprisonment, or investment, lasts or is intended to last:

each of the periods in the year, alternating with holidays or vacations, during which instruction is given in a school, college, or university, or during which a court holds sessions:

conditions under which an action may be undertaken or agreement reached; stipulated or agreed-upon requirements: