(idiomatic) Immediately; instantaneously. / 2007 April 28, Hugh Muir, The Guardian:

Used other than figuratively or idiomatically: see go, in. / (of the sun, moon or stars) To become obscured by clouds. / To share in part of a project's or plan's duties or costs.

(inorganic chemistry) The crystalline salt of trivalent iron and sulfuric acid, Fe₂(SO₄)₃.

(inorganic chemistry) The green, crystalline salt of divalent iron and sulfuric acid, FeSO₄, used as a pigment, and in water treatment.

(music) A musical instrument that produces sound by means of vibrating strings.

(music) A musical instrument in which sound is produced by blowing against an edge or by vibrating a thin piece of wood or metal known as the reed, and in which the pitch is governed by the resonant frequencies of an enclosed air column.

(law, banking, business) a legal document, as a cheque or bill of exchange, that is freely negotiable.

(transitive, idiomatic, Britain) To stop doing a regular activity. Often a job or studies.

plural of branding iron

To disagree with something, and to raise objections to it