(arithmetic, logic) A notation for arithmetic (and logical) formulae in which operations (respectively, quantifiers and operands) are written immediately before their operands, used to avoid the need for parentheses; for example, 3 * (4 + 7) is written as * 3 + 4 7 and A AND B is written as AND A B.

An automobile used by a police officer when on duty.

A fiscal policy achieved through government intervention, as opposed to automatic stabilizers.

A door that slides into the wall.

(idiomatic) A male exemplar of some trait.

(idiomatic) A female exemplar of some trait.

(chiefly Canada, US, idiomatic) One who is a prototypical or quintessential example of something.

(intransitive, informal) To leave and return in a short time. / (intransitive, informal) To die suddenly. / (transitive, informal) To kill someone.

The contamination of the atmosphere by noxious gases and particulates.

(US) a purse or handbag. / (dated) A wallet for paper money. / (figuratively) One's personal budget or economic capacity - the amount one can afford.