(category theory) An object within a category which sends out arrows to all other objects in that category, and such that each of these arrows is unique.

(category theory) An object within a category which receives arrows from all other objects in that category, and such that each of these arrows is unique.

(category theory) An object which indexes a family of arrows between two given objects in a universal way, meaning that any other indexed family of arrows between the same given pair of objects must factor uniquely through this universally-indexed family of arrows.

(grammar) A complement which is coupled to an object.

(snooker, billiards) The ball which the cue ball is intended to hit.

Any fact, technique or other outcome that a student is expected to have learnt or achieved by the end of a specific course of instruction

(law, finance) The party owed an obligation by another party, the obligor.

(genetics) An individual who may be clinically unaffected but who must carry a gene mutation based on analysis of the family history; this usually applies to disorders inherited in an autosomal recessive and X-linked recessive manner.

plural of oblique case

(object-oriented programming) An object that encapsulates a function pointer (or equivalent).