Definition of sure

• superl. - Certainly knowing and believing; confident beyond doubt; implicity trusting; unquestioning; positive.
• superl. - Certain to find or retain; as, to be sure of game; to be sure of success; to be sure of life or health.
• superl. - Fit or worthy to be depended on; certain not to fail or disappoint expectation; unfailing; strong; permanent; enduring.
• superl. - Betrothed; engaged to marry.
• superl. - Free from danger; safe; secure.
• adv. - In a sure manner; safely; certainly.