Sure (superl.) Certainly knowing and believing; confident beyond doubt; implicity trusting; unquestioning; positive.

Sure (superl.) Certain to find or retain; as, to be sure of game; to be sure of success; to be sure of life or health.

Sure (superl.) Fit or worthy to be depended on; certain not to fail or disappoint expectation; unfailing; strong; permanent; enduring.

Sure (superl.) Betrothed; engaged to marry.

Sure (superl.) Free from danger; safe; secure.

Sure (adv.) In a sure manner; safely; certainly.