Source : Webster's Revised Unabridged Dictionary (1913)

Careen \Ca*reen"\, v. t. [imp. & p. p. {Careened}; p. pr. & vb.
   n. {Careening}.] [OF. cariner, F. car['e]ner, fr. OF.
   car[`e]ne, the bottom of a ship, keel, fr. L. carina.]
   (Naut.)
   To cause (a vessel) to lean over so that she floats on one
   side, leaving the other side out of water and accessible for
   repairs below the water line; to case to be off the keel.

Careen \Ca*reen"\, v. i.
   To incline to one side, or lie over, as a ship when sailing
   on a wind; to be off the keel.

Source : WordNet®

careen
     n : pitching dangerously to one side [syn: {rock}, {sway}, {tilt}]
     v 1: walk as if unable to control one's movements; "The drunken
          man staggered into the room" [syn: {stagger}, {reel}, {keel},
           {lurch}, {swag}]
     2: move sideways or in an unsteady way; "The ship careened out
        of control" [syn: {wobble}, {shift}, {tilt}]