vt to keep out, off, or away; to exclude.
2. expel ·vt to drive away from one's country; to banish.
3. expel ·vt to discharge; to shoot.
4. expel ·vt to cut off from further connection with an institution of learning, a society, and the like; as, to expel a student or member.
5. expel ·vt to drive or force out from that within which anything is contained, inclosed, or situated; to eject; as to expel air from a bellows.