impeller

UK: /ɪmˈpɛlə/ US: (im pel′ər)

WordReference Random House Unabridged Dictionary of American English © 2025

im•pel•ler  (im pel′ər), n. 

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

• impel + -er¹ 1675–85

Collins Concise English Dictionary © HarperCollins Publishers::

impeller / ɪmˈpɛlə/ noun

1. the vaned rotating disc of a centrifugal pump, compressor, etc

WordReference Random House Learner's Dictionary of American English © 2025

im•pel /ɪmˈpɛl/   v. [~ + object] , -pelled, -pel•ling. 

1. to urge forward;
   to force (to some action):
   The economic conditions impelled us.
   [~ + object + to + verb]
   Financial problems impelled the firm to cut its budget.
2. to impart motion to:
   The wheel acts to impel the shaft.

im•pel•ler, n. [countable] See -pel-.

WordReference Random House Unabridged Dictionary of American English © 2025

im•pel  (im pel′), v.t., -pelled, -pel•ling. 

1. to drive or urge forward;
   press on;
   incite or constrain to action.
2. to drive or cause to move onward;
   propel;
   impart motion to.

• Latin impellere to strike against, set in motion (transitive), equivalent. to im- im-¹ + pellere to strike, move (something); akin to pulse¹
• late Middle English impellen 1375–1425

Synonyms

• 1. actuate. See compel. 

Antonyms

• 1. restrain.