(obsolete) Mentally dull; stupid.

(computing) A collision of the head of a hard drive with the platter, resulting in permanent damage to the hard drive.

(colloquial, dated) stupid

(nautical) A bulkhead on the forecastle and halfdeck of a ship.

Alternative form of niggerhead

Having two heads; two-headed.

Having two heads or faces on one body. / Directed by two heads or chiefs; existing under two coordinate authorities.

Alternative form of bonehead

(euphemistic) crazy, insane

(obsolete) A blockhead; a dunce.