(intransitive) To set a booby-trap. / (transitive) To install a booby-trap in or on (a harmless object).

(anthropology, archaeology) A farmstead with its people, plants and animals, considered as a unit. / (dated) In the UK a college (or collectively its fellows) in Cambridge or Oxford.

A commune of France.

Initialism of science fiction or speculative fiction, often used to avoid having to choose between the two. / Initialism of square feet. / Initialism of spontaneous fission.