Sing

v. (past sang; past part sung) 1 utter musical sounds, esp. words with a set tune. 2 utter or produce by singing. 3 (of the wind, a kettle, etc.) hum, buzz, or whistle. 4 (of the ears) hear a humming sound. 5 slang turn informer. 6 (foil. by of) literary celebrate in verse. n. act or spell of singing. E sing out shout. sing the praises of praise enthusiastically.