(idiomatic) To slap someone on the side of the head, usually as an informal punishment.

plural of black box warning

plural of box elder maple

plural of box and whiskers plot

(US) A warning, surrounded by a black border, affixed to a prescription drug to indicate that it may cause serious or life-threatening effects.

(statistics) A graphical summary of a numerical data sample through five statistics — median, upper quartile, lower quartile, and upper extreme and lower extreme values — by depiction as a box with its edges at the quartile marks and an internal line at the median and with lines protruding from the box as far as the extremal values.

(software, testing) The testing of the internal structure, rather than the functionality, of a system.

(software, testing) Any form of testing in which knowledge of the internals of the system being tested are unknown and unimportant.

(idiomatic, politics) To commit fraud in an election by depositing extra or otherwise illegitimate ballots into the container holding voters' ballots, in an attempt to predetermine the outcome.

A uniquely addressable lockable box located on the premises of a post office that may be hired as collection point for mail. / (electricity) A test instrument once used by telephone engineers.