Definition of "woom" [woom]

• A trade-name for the fur of the beaver. There are four sorts—silvery, pale, white, and brown. (noun)

The Century Dictionary (Public Domain)

• "A low woom was heard, and the walkway behind her blew to pieces from the sonic wave blast."
• "She could hear a distinct electronic hum rising in pitch, followed by a woom sound of intense sonic vibration."
• "The haunting low sound of a woom echoed over the landscape."