1. Impossible to doubt or dispute; certain.
2. Not hesitating or wavering; firm: sure convictions.
3. Confident, as of something awaited or expected: sure of ultimate victory.
a. Bound to come about or happen; inevitable: sure defeat.
b. Having one's course directed; destined or bound: sure to succeed.
5. Certain not to miss or err; steady: a sure hand on the throttle.