An individual who avoids drinking alcohol at a social engagement for the purpose of driving their companions home.

(architecture, computing, design) A formal way of documenting a general reusable solution to a design problem in a particular field of expertise.

A process of design applied to products that are to be manufactured through techniques of mass production.

(baseball) A batter who is permitted to substitute for a pitcher in the batting rotation for the duration of a baseball game.

plural of designer dyke

(LGBT, slang) A lipstick lesbian.

plural of designated runner

A pinch runner.

(mathematics) In combinatorial mathematics, a set together with a family of subsets (repeated subsets are allowed at times) whose members are chosen to satisfy some set of properties deemed useful for a particular application.

plural of designer label