Noah Webster's New International Dictionary of the English Language

1. (v. t.) To drive out or away; to expel.

2. (v. t.) To destroy utterly; to cut off; to extirpate; to annihilate; to root out; as, to exterminate a colony, a tribe, or a nation; to exterminate error or vice.

3. (v. t.) To eliminate, as unknown quantities.