Main Entry:

opaque

Pronunciation:

\ō-ˈpāk\

Function:

adjective

Etymology:

Latin opacus

Date:

1641

1: exhibiting opacity : blocking the passage of radiant energy and especially light2 a: hard to understand or explain <opaque prose> b: obtuse, thickheaded

— opaque noun

— opaque·ly adverb

— opaque·ness noun