A building, typically adjacent to or spanning a railway line, from where signals, points and (sometimes) level crossings are controlled. / The alarm-box of a police or fire-alarm system.

(computing, graphical user interface) A user interface control for displaying an image.

(mathematical analysis) A k-cell which is a Cartesian product of half-closed intervals which are closed at their infima and open at their suprema, and such that the infimum of each interval is the coordinate of a given point (called "the corner" of the δ-box), and the length (i.e., measure) of each interval is equal to (the given value) δ.

plural of cardboard box

plural of penalty box

plural of charity box

A container into which people can put money to be collected by a charitable organization.

plural of check box

An opaque box with an opening, allowing a person to put their hand in, feel the object inside, and guess at what it is.

plural of musical box