With reference to learning and knowledge. As a count noun. A branch of learning or knowledge; a field of study or expertise; a discipline…

In plural. Certain branches of study, esp. at a university, serving as a preparation for more advanced studies or for later life, spec. (a) (in…

Originally: the seven subjects of the trivium (grammar, rhetoric, and logic) and quadrivium (arithmetic, geometry, music, and astronomy) considered…

Also with capital initial. (a) A sphere of knowledge or skill that an academy might teach; (b) a treatise on such a subject. Frequently in titles of…