Definitions

1. noun

A natural opening, especially in a leaf or flower; or the size of the opening in a camera or other optical instrument that regulates the amount of light admitted.

“The aperture of the lens was adjusted to let in more light.”

2. noun

A limited or narrow view or understanding of something.

“The artist’s aperture of reality was limited to the small village he had grown up in.”

3. noun

The period of time during which something is possible or available.

“The aperture for filing tax returns was extended by a few days.”