A drum kit

Alternative form of setup

(mathematics) A set which contains any convex combination of any (finite) subset of its points.

Set deeply below a surface, as on a face. / (figuratively) firmly in place; long-standing

present participle of set on fire

present participle of set fire

A small model railroad with trains that move around the tracks by electricity (formerly by clockwork) / Alternative form of trainset.

(geometry) One of the 288 sets of seven of the 28 bitangents of a quartic curve corresponding to the seven odd theta characteristics of a normal set.

To cause (something) to begin to burn. / (figuratively) To arouse passion in (someone); to excite.

(computer science) A mathematical function whose input is a set (usually of real numbers or a set of points in the Euclidean or some measure space), and whose output is usually a number.