Of or relating to the production of sound through the mouth, Of or resembling vowels; vocalic, Music Of, relating to, or performed by singing, noun_ A part or melody that is sung in a musical performance or recording, phonetics A vocal sound; specifically, a purely vocal element of speech, unmodified except by resonance; a vowel or a diphthong; a tonic element; a tonic; -- distinguished from a subvocal, and a nonvocal, music intended to be performed by one or more singers, usually with instrumental accompaniment