A rough, opaque piece of glass of suitable size, design and composition for use, when ground and polished, as a multifocal lens for use in a pair of eyeglasses.

plural of lens blank

plural of blank end

(intransitive, idiomatic) To become blank. / To temporarily lose memory. / To erase (something), leaving a blank in its place. / To erase from one's memory.

plural of blank canvas

plural of blank canvas

(figuratively) Something with no content, upon which one can easily impose or project one's point of view. / Used other than figuratively or idiomatically: see blank, canvas.

plural of blank cheque

(Australia, New Zealand, Britain, Canada) Alternative form of blank check

(colloquial, of a male) To be sterile.