Sure may refer to:
Seemingly unrelated regressions
Sure, as probability, see certainty
Sure (brand), a brand of antiperspirant deodorant
Sure (Cable & Wireless), a telephone company operating in the British Crown dependencies
Stein's unbiased risk estimate (SURE), in estimation theory
The Celebrity, by arts unknown, induced Mrs. Judge Short and two other ladies to call at Mohair on an afternoon when Mr. Cooke was trying a trotter on the track. The three returned wondering and charmed with Mrs. Cooke; they were sure she had had no hand in the furnishing of that atrocious house.