(behavioral sciences) A box or cage in which a subject (usually an animal) may be isolated from outside influences and studied; used in operant conditioning experiments where the subject can operate a lever to obtain a reward or avoid a painful shock.

(informal, aviation) A flight recorder; the brightly colored cockpit voice recorders and flight data recorders in an aircraft designed to aid in determining the cause of an accident.

(web development) To focus on the inputs and outputs without worrying about the internal complexity.

(Britain) A free-standing item of street furniture in the form of a short, red pillar with a slot for posting letters.

A steel beam with a hollow rectangular cross section; used for constructing bridges etc.

Alternative spelling of lunchbox

(Australia, New Zealand) A lady’s storage box containing items saved for her wedding or married life.

A narrow box filled with earth, placed on a windowsill and used for growing plants. / One of the hollows in the sides of a window frame for the weights which counterbalance a lifting sash.

(chiefly Britain) A witness stand in a courtroom.

A sealed box with a slit, into which a voter puts a completed voting slip. / The process or method of voting.