(sociology) Any of various models of group behavior (such as economic behavior, criminal behavior, or consumer behavior) as the cumulative result of rational choices made by individuals expressing on their preferences and/or meeting their needs.

(public policy, law, ethics) Supportive of a person's right to choose whether or not to have an abortion.

Having such a selection of good choices that deciding which one to pick is difficult.

(law, narcotics) The particular (usually illicit) substance that a person is addicted to. / The best-choice medication to treat a particular medical problem.

(economy) A choice made between current benefits and future benefits. For example, by consuming less today and saving more, consumption could be increased in the future.

Having more than one possible answer, to be chosen from a list provided.

The most suitable and most optimal choice. / The prime cut. / The one with the highest ranking.

plural of choice function

(set theory) A function whose domain is a family of nonempty sets, and which selects a member from each of those sets as its value.

That one has chosen, or wishes to choose.