(medicine) Computed axial tomography scan.

Alternative spelling of cathouse

An undomesticated felid, as tigers or lions. / A feral cat.

A relationship in which two parties closely monitor and challenge one another in a suspicious or self-protective manner, often because each party is attempting to gain an advantage over the other.

Alternative form of cat-and-mouse

A children's game in which one player (the "cat") attempts to break through a ring of players to catch another player (the "mouse") in the centre.

(idiomatic) A highly sought-after and fancy example of something, usually referring to inanimate objects.

A paw of a cat. / (figuratively) Someone who acts in another's interest, (properly) unknowingly or through trickery. / (nautical) A minor breeze that ripples the surface of a body of water.

A hypothetical cat that is depicted as being surrounded by perfectly uncertain circumstances that make an external observer absolutely unable to deem the cat either alive or dead, especially if the possibilities of survival of the cat are expected to be analysed from the point of view of quantum mechanics. Typically, these circumstances involve the cat being inside a box while being the victim of a danger that may or may not kill it, such as radiation.

The thought experiment which was devised by Erwin Schrödinger, is usually considered a paradox, involves a Schrödinger's cat and is typically supposed to be analysed from the point of view of quantum mechanics.