Definition of expel
- expelled the smoke from her lungs
- was expelled from college
The club may expel members who do not follow the rules.
She was expelled from school for bad behavior.
expel air from the lungs
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To expel is to drive out, and its usual noun is expulsion. Expel is similar to eject, but expel suggests pushing out while eject suggests throwing out. Also, ejecting may only be temporary: the player ejected from a game may be back tomorrow, but the student expelled from school is probably out forever.
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