• (p. pr. & vb. n.) of Hum • (n.) A sound like that made by bees; a low, murmuring sound; a hum. • (a.) Emitting a murmuring sound; droning; murmuring; buzzing. Found on http://thinkexist.com/dictionary/meaning/humming/
Hum'ming noun A sound like that made by bees; a low, murmuring sound; a hum. Hummingale , lively or strong ale. Dryden. -- Humming bird (Zoology) , any bird of the family Trochilidæ , of which over one hundred genera are known, including about four ... Found on http://www.encyclo.co.uk/webster/H/70