A device that connects some source of signal to a television set, often decrypting a digitally encrypted signal from a communications satellite or cable network.

(idiomatic) Driven by habit; inclined or determined to continue according to one's custom or established preferences.

(set theory) A mathematical notation for describing a set by specifying the properties that its members must satisfy.

(idiomatic) To choose a man as a potential husband (for a girl). / (idiomatic, more generally) To choose something as a goal.

(computing, Internet) A value that is used to identify a key set.

(idiomatic) To achieve something amazing; to do something which brings great public acclaim.

(set theory, order theory, loosely) A set that has a given, elsewhere specified partial order. / (set theory, order theory, formally) The ordered pair comprising a set and its partial order.

(set theory, of two sets A and B) The set that contains exactly those elements belonging to A but not to B; the relative complement of B in A.

(networking) a code that identifies the network to which packets on a wireless network belong

(sports) on your mark, get set, go