A screw with threads along the entire length and no head. Typically, set screws have a hex or slot drive recessed in the threaded length; a grub screw or worm screw.

To render something permanent, certain, or firm.

(idiomatic) Permanent; certain; firm.

(set theory) A set that is countable.

(graph theory) A set of vertices of a graph, such that each vertex in that graph is either in that set or adjacent to a vertex in that set.

(graph theory) a set of vertices of a graph, such that no pair of them are adjacent to each other; in other words, a set of vertices which are all "independent" of each other

(set theory) A mathematical operation that returns a set taking one or more sets as input.

Alternative spelling of set theoretically

(mathematics) In a manner which uses set theory / (mathematics) In the sense of set theory

A collection of recordings sold together in a single package.