verb, sang or, often, sung; sung; sing⋅ing; noun | 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. |
| 12. | to utter with musical modulations of the voice, as a song. |
| 13. | to escort or accompany with singing. |
| 14. | to proclaim enthusiastically. |
| 15. | to bring, send, put, etc., with or by singing: She sang the baby to sleep. |
| 16. | to chant or intone: to sing mass. |
| 17. | to tell or praise in verse or song. |
| 18. | the act or performance of singing. |
| 19. | a gathering or meeting of persons for the purpose of singing: a community sing. |
| 20. | a singing, ringing, or whistling sound, as of a bullet. |
| 21. | sing out, Informal. to call in a loud voice; shout: They lost their way in the cavern and sang out for help. |

sing out
Call out loudly, shout, as in One of them fell in the stream and sang out for help. [Early 1800s]