|1.||Impervious to the rays of light; not transparent; as, an opaque substance.|
|2.||Obscure; not clear; unintelligible.|
|n.||1.||That which is opaque; opacity.|
|Adj.||1.||opaque - not clear; not transmitting or reflecting light or radiant energy; "opaque windows of the jail"; "opaque to X-rays"|
clear - free from cloudiness; allowing light to pass through; "clear water"; "clear plastic bags"; "clear glass"; "the air is clear and clean"
|2.||opaque - not clearly understood or expressed|