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The Collaborative International Dictionary
Be sure

Sure \Sure\, a. [Compar. Surer; superl. Surest.] [OE. sur, OF. se["u]r, F. s[^u]r, L. securus; se aside, without + cura care. See Secure, and cf. 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.
    --Shak.

    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.
    --Ps. xix. 7.

    Which put in good sure leather sacks.
    --Chapman.

  4. Betrothed; engaged to marry. [Obs.]

    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. --Shak. To be sure, or Be sure, certainly; without doubt; as, Shall you do? To be sure I shall. To make sure.

    1. 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.

    2. To betroth. [Obs.]

      She that's made sure to him she loves not well.
      --Cotgrave.

      Syn: Certain; unfailing; infallible; safe; firm; permanent; steady; stable; strong; secure; indisputable; confident; positive.

Usage examples of "be sure".

But he's been soured by his experiences here in Washington, and of course he can't just write a letter or fill out a form, and tell all about it, because then it would be sure to leak out to the wrong people.

They could watch us make as much rubber as they'd need for their tests, and then they could be sure it was a genuine synthetic.

Tell him to be sure and stay awake so he can go on adding to his collection.

But she overheard just enough, and she'd assimilated enough general background, to be sure that the Savoy Plaza could be an unhealthy joint for me to go home to .

She sensed he was mocking her, but she couldn't be sure and it was easier not to think about it.

His car was one placemaybe the only placewhere he could be sure of getting some peace and quiet.

Adrian made a mental note to himself to be sure to observe the way the sun moved as the day advanced He still had no idea of the proper directions in this world-if indeed such an idea had any real meaning here.

Still the Prince thought it might be following him, though he could not be sure on which bank of the narrow river it had its source.

Adrian could not be sure what kind of power was indicated, but certainly something more than mere physical ability.

It would be difficult for any magician, even himself or Wood, to be sure which one of those branchings Adrian had taken, assuming the boy did go downstream.

He can't see her well enough to be sure, but he thinks maybe Mrs Wyler is naked from the waist up, that she's standing there in her front hall wearing nothing but a pair of shorts.

Bill said they had simply hurried on their merry way, because he wanted to be sure of getting to Carson City by dark.

Beyond that point lies some three hundred years of straight cruisingat an astonishing velocity, to be sure, but still cruising.