Noah Webster's New International Dictionary of the English Language

1. (v. t.) To expel; to discharge; to release; to cause to disappear.

2. (v. t.) To cause to disappear from an equation; as, to eliminate an unknown quantity.

3. (v. t.) To set aside as unimportant in a process of inductive inquiry; to leave out of consideration.

4. (v. t.) To obtain by separating, as from foreign matters; to deduce; as, to eliminate an idea or a conclusion.

5. (v. t.) To separate; to expel from the system; to excrete; as, the kidneys eliminate urea, the lungs carbonic acid; to eliminate poison from the system.