The meaning of Apertures and additional information.

Aperture(n.) The act of opening.

Aperture(n.) An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.

Aperture(n.) The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.