The Collaborative International Dictionary of English v.0.48:

Loose \Loose\ (l[=oo]s), a. [Compar. Looser (l[=oo]s"[~e]r);
   superl. Loosest.] [OE. loos, lous, laus, Icel. lauss; akin
   to OD. loos, D. los, AS. le['a]s false, deceitful, G. los,
   loose, Dan. & Sw. l["o]s, Goth. laus, and E. lose. [root]127.
   See Lose, and cf. Leasing falsehood.]
   1. Unbound; untied; unsewed; not attached, fastened, fixed,
      or confined; as, the loose sheets of a book.
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            Her hair, nor loose, nor tied in formal plat.
                                                  --Shak.
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   2. Free from constraint or obligation; not bound by duty,
      habit, etc.; -- with from or of.
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            Now I stand
            Loose of my vow; but who knows Cato's thoughts ?
                                                  --Addison.
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   3. Not tight or close; as, a loose garment.
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   4. Not dense, close, compact, or crowded; as, a cloth of
      loose texture.
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            With horse and chariots ranked in loose array.
                                                  --Milton.
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   5. Not precise or exact; vague; indeterminate; as, a loose
      style, or way of reasoning.
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            The comparison employed . . . must be considered
            rather as a loose analogy than as an exact
            scientific explanation.               --Whewel.
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   6. Not strict in matters of morality; not rigid according to
      some standard of right.
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            The loose morality which he had learned. --Sir W.
                                                  Scott.
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   7. Unconnected; rambling.
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            Vario spends whole mornings in running over loose
            and unconnected pages.                --I. Watts.
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   8. Lax; not costive; having lax bowels. --Locke.
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   9. Dissolute; unchaste; as, a loose man or woman.
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            Loose ladies in delight.              --Spenser.
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   10. Containing or consisting of obscene or unchaste language;
       as, a loose epistle. --Dryden.
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   At loose ends, not in order; in confusion; carelessly
      managed.

   Fast and loose. See under Fast.

   To break loose. See under Break.

   Loose pulley. (Mach.) See Fast and loose pulleys, under
      Fast.

   To let loose, to free from restraint or confinement; to set
      at liberty.
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