Webster's Revised Unabridged Dictionary · 1913

Sure

Sure , adjective

[Old English sur, Old French seur, French sûr, Latin securus; se aside, without + cura care. See Secure, and compare Assure, Insure, Sicker sure.]

1.
Certainly knowing and believing; confident beyond doubt; implicity trusting; unquestioning; positive.
We are sure that the judgment of God is according to truth against them which commit such things. — Rom. ii. 2
I'm sure care 's an enemy of life. — Shakespeare
2.
Certain to find or retain; as, to be sure of game; to be sure of success; to be sure of life or health.
3.
Fit or worthy to be depended on; certain not to fail or disappoint expectation; unfailing; strong; permanent; enduring.
His sure word. — Keble
The Lord will certainly make my lord a sure house; because my lord fighteth the battles of the Lord. — 1 Sam. xxv. 28
The testimony of the Lord is sure. — Bible (KJV) - Psalm xix. 7
Which put in good sure leather sacks. — Chapman
4.
Betrothed; engaged to marry. [Obsolete]
The king was sure to Dame Elizabeth Lucy, and her husband before God. — Sir T. More
I presume... that you had been sure as fast as faith could bind you, man and wife. — Brome
5.
Free from danger; safe; secure.
Fear not; the forest is not three leagues off; If we recover that we are sure enough. — Shakespeare
She that's made sure to him she loves not well. — Cotgrave
Collocations (2)
To be sure or Be sure , certainly; without doubt; as, Shall you do? To be sure I shall.
To make sure , (a) To make certain; to secure so that there can be no failure of the purpose or object. Make Cato sure. — Addison A peace can not fail, provided we make sure of Spain. — Sir W. Temple (b) To betroth. [Obsolete]

Sure , adverb

In a sure manner; safely; certainly.
Great, sure, shall be thy meed. — Spenser
'T is pleasant, sure, to see one's name in print. — Byron