The engineer, or driver of a locomotive

(baseball) One who plays in the same battery, either the pitcher or the catcher.

(dated) A slideshow, often using an early form of slide projector that could achieve simple animation by moving and merging images.

(historical) An early light projector and precursor to the slide projector that could achieve simple animation by moving and merging images. / (dated) A slide projector.

Capable of being washed in a washing machine without being damaged. / (nonstandard) Dishwasher-safe.

Alternative form of airmail

Alternative form of airmail

A slot in a wall or door through which mail is delivered.

A kind of mail (armour for the torso) made of overlapping metal plates, resembling the scales of a fish.

The most important building of a group of buildings (e.g. in a school/university).