(shipbuilding) A method of working long tapering planks by bringing the but of one plank to the top of the other to make up a constant breadth in two layers.

A surname.

A surname.

plural of Top

Acronym of twin oligohydramnios-polyhydramnios sequence.

plural of boot-topping

(military, government) Information classified at one of the highest levels of sensitivity by a government, based on an assessment that it would cause exceptionally grave damage to national security if disclosed.

A secret that is classed as "top secret"; a top-secret secret; top-secret information. / Used other than figuratively or idiomatically: see top, secret.

An item of casual clothing: a top with no sleeves. / The top of a ship's bilge tank, usually the lowest horizontal surface on board.

(cricket) The edge of a bat farthest from the ground. / (cricket) A deflection of a ball off of the top edge of a bat, into the air and potentially for a catch.