Entry 3 senses · 2 variants Webster, 1913

Opaque

/ōp-āk'/ · O·paque · IPA /oʊˈpeɪk/

01 a. Impervious to the rays of light; not transparent; as, an opaque substance.

1.
Impervious to the rays of light; not transparent; as, an opaque substance.
2.
Obscure; not clear; unintelligible.[Colloq.]

02 n. That which is opaque; opacity.

1.
That which is opaque; opacity.