Cleat is the naval term for the fitting on ships, boats, and docks to which ropes are tied. A common variety is the deck cleat, which is shaped like a set of horns, although other types exist.
Cleats are also used to tie off the strings for folding window blinds, to prevent the weight of the blind from pulling it down.
Cleats are a type of shoe designed especially for sports played on grass or dirt, such as baseball or soccer. The shoes generally have large studs on the bottom to assist in gripping the surface, preventing sliding and assisting in rapid changes of direction. The stud itself is often called a cleat.
A cleat is a metal or plastic piece that attaches to the bottom of a cycling shoe that interfaces with a clipless pedal system.
Cleat is the term in construction and cabinetry/joinery for a short length of timber fixed to a board or other object for the purpose of hanging or fixing the object to another object - for example, a cleat may be fixed to the back of a cabinet so that it may be hung from a wall.
A Cleat is also an item used in Filmmaking to fix a camera to the side of moving objects like cars and boats.