fourth

To apparently communicate with reality directly, such as when characters of literature comment on the existence of a reader.

Journalism or journalists considered as a group; the press.

The fourth of the available gears in a transmission or other gearbox.

Terrible, awful; less than third-rate.

The imaginary invisible wall at the front of the stage in a proscenium theatre, through which the audience sees the action in the world of the play.