Definition of con

• adv. - Against the affirmative side; in opposition; on the negative side; -- The antithesis of pro, and usually in connection with it. See Pro.
• v. t. - To know; to understand; to acknowledge.
• v. t. - To study in order to know; to peruse; to learn; to commit to memory; to regard studiously.
• v. t. - To conduct, or superintend the steering of (a vessel); to watch the course of (a vessel) and direct the helmsman how to steer.