WordNet Dictionary- [adj] (of color) not chromatically pure; diluted; "an unsaturated red"
- [adj] (chemistry) used of a compound (especially of carbon) containing atoms sharing more than one valence bond; "unsaturated fats"
- [adj] not saturated; capable of dissolving more of a substance at a given temperature; "an unsaturated salt solution"
Webster's 1913 Dictionary\Un*sat"u*ra`ted\, a. 1. Capable of absorbing or dissolving to a greater degree; as, an unsaturated solution. 2. (Chem.) Capable of taking up, or of uniting with, certain other elements or compounds, without the elimination of any side product; thus, aldehyde, ethylene, and ammonia are unsaturated.