Term of Art: Preposition

“Preposition: A word that relates its object (a noun, pronoun, or -ing verb form) to another word in the sentence. She is the leader of our group. We opened the door by picking the lock. She went out the window.”

Excerpted from: Strunk, William Jr., and E.B. White. The Elements of Style, Fourth Edition. New York: Longman, 2000.