To sing with closed lips without articulation.
| 单词 | θ226048 | 
| 释义 | society > leisure > the arts > music > performing music > singing > sing			[verb (intransitive)]		 > hum (3)		 humc1485 To sing with closed lips without articulation. tune1755 To utter inarticulate musical notes or melody; to hum. dialect. noodle1897 transitive and intransitive. To sing (a tune) in a low undertone; to hum. | 
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