An opening in the ground that emits steam and gases due to volcanic activity.

The act of fumigating, or applying smoke or vapor, as for disinfection. / Vapor raised in the process of fumigating.

(transitive) To disinfect, purify, or rid of vermin with the fumes of certain chemicals.

A gas or vapour/vapor that is strong-smelling or dangerous to inhale. / A material that has been vaporized from the solid or liquid state to the gas state and re-coalesced to the solid state.

(transitive) To expose (something) to fumes; specifically, to expose wood, etc., to ammonia in order to produce dark tints. / (transitive) To apply or offer incense to. / (intransitive) To emit fumes.

(transitive, intransitive) To handle nervously or awkwardly. / (transitive, intransitive) To grope awkwardly in trying to find something / (intransitive) To blunder uncertainly.

(sports, American football, Canadian football) A ball etc. that has been dropped by accident.

(Britain) A dessert similar to a cross between a fool and a crumble.

(organic chemistry) an unsaturated organic dicarboxylic acid, HOOCCH=CHCOOH, the geometric isomer of maleic acid from which it may be prepared by heating; it is found in many plants, including fungi and mosses, and is essential in the chemistry of respiration; it has a number of industrial applications, and its esters, the fumarates, are used in the treatment of psoriasis

Any salt or ester of fumaric acid; they are produced in the body as part of the urea cycle.