What is the meaning of Backfield?

The rear part of the field of play, particularly

  1. Synonym of outfield.
  2. The area behind the line of scrimmage occupied before the snap by the team on offense.
  3. The area behind either the offensive or defensive line.

Synonym of outfield.

The area behind the line of scrimmage occupied before the snap by the team on offense.

The area behind either the offensive or defensive line.

The players occupying this area.

Source: wiktionary.org