- a thick-headed or stupid person; blockhead.
- loggerhead turtle.
- loggerhead shrike.
- a ball or bulb of iron with a long handle, used, after being heated, to melt tar, heat liquids, etc.
- a rounded post, in the stern of a whaleboat, around which the harpoon line is passed.
- a circular inkwell having a broad, flat base.
- engaged in a disagreement or dispute; quarreling: They were at loggerheads over the distribution of funds.
- a large-headed turtle, Caretta caretta, occurring in most seas: family Chelonidae
- a North American shrike, Lanius ludovicianus, having a grey head and body, black-and-white wings and tail, and black facial stripe
- a tool consisting of a large metal sphere attached to a long handle, used for warming liquids, melting tar, etc
- a strong round upright post in a whaleboat for belaying the line of a harpoon
- a blockhead; dunce
- engaged in dispute or confrontation
