definition of
expel

[1] #1 expel v. [throw out, kick out] force to leave or move out; "He was expelled from his native country". wn

[2] #2 expel v. [oust, throw out, drum out, boot out, kick out] remove from a position or office; "The chairman was ousted after he misappropriated funds". wn

[3] #3 expel v. [rout, rout out] cause to flee; "rout out the fighters from their caves". wn

[4] #4 expel v. [exhaust, discharge, eject, release] eliminate (a substance); "combustion products are exhausted in the engine"; "the plant releases a gas". wn