1. (a.) Having one meaning only; -- contrasted with equivocal.

2. (a.) Having unison of sound, as the octave in music. See Unison.

3. (n.) Having always the same drift or tenor; uniform; certain; regular.

4. (n.) Unequivocal; indubitable.

5. (n.) A generic term, or a term applicable in the same sense to all the species it embraces.

6. (n.) A word having but one meaning.

absolute apodictic apparent bound certain clean-cut clear clear and distinct clear as crystal clear as day clear-cut coherent conclusive connected consistent crisp crystal-clear crystalline decisive defined definite determinate direct distinct evident explicit express ineluctable inevitable limpid loud and clear lucid luminous manifest monadal monadic necessary obvious one-piece one-sided palpable patent pellucid perfectly sure perspicuous plain positive predestined predetermined simple straightforward sure sure-enough translucent transparent transpicuous TRUE unambiguous unconfused unequivocal uniangulate unibivalent unibranchiate unicameral unicellular unicuspid unidentate unidigitate unidimensional unidirectional uniflorous unifoliate unifoliolate unigenital uniglobular unilateral unilinear uniliteral unilobed unilobular unimodular unimolecular uniocular unipart unipartite unipolar univalent unmistakable well-defined