v. t. [ imp. & p. p. Careened p. pr. & vb. n. Careening. ] [ OF. cariner, F. caréner, fr. OF. carène, 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. [ 1913 Webster ]