The Collaborative International Dictionary of English v.0.48:

Cot \Cot\ (k[o^]t), n. [OE. cot, cote, AS. cot, cote, cottage;
   akin to D. & Icel. kot, G. koth, kot, kothe. Cf. Coat.]
   1. A small house; a cottage or hut.
      [1913 Webster]

            The sheltered cot, the cultivated farm. --Goldsmith.
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   2. A pen, coop, or like shelter for small domestic animals,
      as for sheep or pigeons; a cote.
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   3. A cover or sheath; as, a roller cot (the clothing of a
      drawing roller in a spinning frame); a cot for a sore
      finger. See also finger cot.
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   4. [Cf. Ir. cot.] A small, rudely-formed boat.
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   Bell cot. (Arch.) See under Bell.
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The Collaborative International Dictionary of English v.0.48:

Cot \Cot\ (k[o^]t), n. [AS. cot cottage, bedchamber; or cf. OF.
   coite, F. couette (E. quilt), LL. cottum, cottus, mattress.
   See Cot a cottage.]
   A sleeping place of limited size; a little bed; a cradle; a
   piece of canvas extended by a frame, used as a bed. [Written
   also cott.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

cot
    n 1: a sheath worn to protect a finger [syn: fingerstall,
         cot]
    2: baby bed with high sides made of slats [syn: crib, cot]
    3: a small bed that folds up for storage or transport [syn:
       cot, camp bed]