blanket or rigid board insulation, composed of glass fibers bound together with a binder, faced or unfaced, used to insulate roofs and walls.

(plural only) A pair of eyeglasses (spectacles) with round lenses.

(idiomatic, of a person) pessimistic

(idiomatic, of a person) optimistic

Synonym of Claude glass

plural of Claude Lorraine glass

(UK) Any of several universities founded in the United Kingdom in the 1960s in the era of the Robbins Report on higher education.

(US politics, uncommon) A Republican who invariably votes for Republican candidates.

(informal) Spectacles with thick black circular frames.

plural of Broken Glass Republican