make musical sounds with the voice, especially words with a set tune

Bella sang to the baby

make a high-pitched whistling or buzzing sound

the kettle was beginning to sing

act as an informer to the police

as soon as he got put under pressure, he sang like a canary

recount or celebrate in poetry or other literature

poetry should sing the variety of the human race

these poets sing of the American experience

a dynasty that ruled in China AD 960–1279