bass Copy link • bass: in music: (i) adj. grăvis, e: a very deep b. tone, sonus gravissimus (as opp. to acutissimus), Cic. Phr.: the lowest b. pitch, vox resonat quae chordis quatuor ima, Hor. (ii) subs. Phr.: to sing the b., *voce ima cantare (cf. Hor. Od. 1, 3, 7), *gravis vocis partes sustinere (Kr.): to sing b. to a tune, *sociare vocem gravem alicui cantui (Kr.): the b. of an organ, *fistulae gravioris soni (Bau. ap. Kr.). Thorough b., i. e., the science of harmony, *concentus ratio, scientia.