—v.i. 1. to utter words or sounds in succession with musical modulations of the voice; vocalize melodically.
2. to perform a song or voice composition: She promised to sing for us. 3. to produce melodious sounds, usually high in pitch, as certain birds, insects, etc.: The nightingale sang in the tree. 4. to compose poetry: Keats sang briefly but gloriously. 5. to tell about or praise someone or something in verse or song: He sang of the warrior's prowess. 6. to admit of being sung, as verses: This lyric sings well. 7. to give out a continuous ringing, whistling, murmuring, burbling, or other euphonious sound, as a teakettle or a brook.
8. to make a short whistling, ringing, or whizzing sound: The bullet sang past his ear. 9. (of an electrical amplifying system) to produce an undesired self-sustained oscillation.
10. to have the sensation of a ringing or humming sound, as the ears.
11. Slang.to confess or act as an informer; squeal.
—v.t. 1. to utter with musical modulations of the voice, as a song.
2. to escort or accompany with singing.
3. to proclaim enthusiastically.
4. to bring, send, put, etc., with or by singing: She sang the baby to sleep. 5. to chant or intone: to sing mass. 6. to tell or praise in verse or song.
7. sing out,Informal.to call in a loud voice; shout: They lost their way in the cavern and sang out for help.
—n. 1. the act or performance of singing.
2. a gathering or meeting of persons for the purpose of singing: a community sing. 3. a singing, ringing, or whistling sound, as of a bullet.