n. A plane figure with four equal sides, having two acute and two obtuse angles, also called a diamond; a rhomb; also, formerly, any oblique parallelogram.n. Somothing resembling such a figure in form. :n. A small cake of sugar, or confection, often medicated, originally in the form of a rhomb, but now variously shaped.n. A pane of glass for window-glazing, either lozenge-shaped or square, but intended to be set diagonally; a quarrel.n. An envelop-blank cut out by a punching-machine.n. In the cutting of brilliants, one of the four quoins of the upper surface or crown. See quoin.n. A spangle.In decorative art, divided by diagonal lines into diamonds or lozenges: a common distribution of decorative design in the fourteenth century: as, a lozenge pattern.