humming
1. [ noun ] a humming noise
Synonyms: hum
Examples:

"the hum of distant traffic"

Related terms: noise hum hum hum
2. [ noun ] (music) the act of singing with closed lips
Related terms: singing hum
Similar spelling:   humongous
  humans
  Hemming
  hamming
  Hemmings
  hemminge
  humanize
  humanist
  humanism
  humanise
  Hemminger
  humanness
  humankind
  Hemmingway