Definition of: sure

(shr) adjective
1. Not liable to change or failure; firm; unyielding; stable; infallible.
2. Fit. proper, or deserving to be depended on; reliable; trustworthy.
3. Free from doubt; certain; positive.
4. Certain of obtaining, attaining, or retaining something: with of.
5. Safe; secure from danger or harm.
6. Bound to happen.
—adverb Colloq. Surely; certainly.
—to be sure Indeed; certainly.
—to make sure To make certain; secure. [<OF sur <L securus. Doublet of SECURE.]
—sure′ness noun Synonyms (adj.): actual, assured, aware, certain, clear, confident, indisputable, positive, real. See AUTHENTIC, FAITHFUL, SECURE.