Lŏg'ger-hĕad, n.

noun

n. [From log and head.]

  1. A blockhead; a dunce; a dolt; a numskull.
  2. A spherical mass of iron, with a long handle, used to heat tar.
  3. (Naut.) A piece of round timber, in a whale-boat, over which the line is passed, to make it run more slowly.
  4. A species of marine turtle.

To be at loggerheads, to fall to loggerheads, or to go to loggerheads, to come to blows; to be at strife.