[ im-pel-er ]
/ ɪmˈpɛl ər /


a person or thing that impels.
a rotor for transmitting motion, as in a centrifugal pump, blower, turbine, or fluid coupling.

Origin of impeller

First recorded in 1675–85; impel + -er1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for impeller

  • She pressed the impeller—just as his left foot kicked in a high arc and caught the side of the barrel.

  • For instance, Zwingli asserted that God was the "author, mover, and impeller to sin."

  • As he did, he saw Astrid's knuckles tighten around the impeller.

British Dictionary definitions for impeller


/ (ɪmˈpɛlə) /


the vaned rotating disc of a centrifugal pump, compressor, etc
a compressor or centrifugal pump having such an impeller
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012