Definitions

1. noun

The back of a book, typically covered with cardboard or stiff paper.

“She turned the book over to read the back cover.”

2. abbreviation

Book

“The library catalog listed the book as BK-123.”

3. noun

A backstroke swimmer or a backstroke swim.

“The backstroker took the lead in the competition.”

4. noun

A backhoe, especially in the context of construction or excavation.

“The backhoe was used to dig a trench for the new pipeline.”

5. noun

The back part of an aircraft, typically containing the tail section.

“The pilot checked the back of the plane before takeoff.”