(idiomatic) To become engulfed in flames, to combust. / (figuratively) To become very popular or widespread; to take off. / (figuratively) To be inspired by passion or zeal.

A shout or whistle expressing dislike, especially from a crowd or audience; a jeer, a boo. / A shout, whistle, or comment of a sexual nature, usually made toward a passing woman.

To make such an exclamation.

(programming) In the Eiffel programming language, a run-time error caused by use of the wrong data type.

Absolute; having no exception. / Of, pertaining to, or using a category or categories.

(logic) A categorical proposition.

In a catastrophic manner, or to a catastrophic extent; disastrously.

(mathematics) The branch of mathematics dealing with dynamical systems which can undergo abrupt irreversible qualitative changes due to a tiny change in parameters.

(mathematics) A branch of mathematics which deals with spaces and maps between them in abstraction, taking similar theorems from various disparate more concrete branches of mathematics and unifying them.

The increase in rate of a chemical reaction caused by the presence of a catalyst. / An amount of catalyst, expressed as the increase of the rate of its reaction.