Synonyms: humming
Definition: the act of singing with closed lips
Similar words: vocalizing, singing
Definition: the act of singing vocal music
Definition: a humming noise
Usage: the hum of distant traffic
Similar words: noise
Definition: sound of any kind (especially unintelligible or dissonant sound)
Usage: he enjoyed the street noises; they heard indistinct noises of people talking; during the firework display that ended the gala the noise reached 98 decibels