Definition of backfield in English:

backfield

noun

American Football
  • 1[mass noun] The area of play behind the line of scrimmage.

    • ‘He made three tackles in the Buc backfield and two more at the line of scrimmage.’
    • ‘The team is in a state of flux at two spots: the offensive line and the defensive backfield.’
    • ‘You might even see him lined up in the backfield once or twice.’
    • ‘To use four wide receivers, the Chargers took some basic pass protection away from the line of scrimmage and the backfield.’
    • ‘They will shift from the line of scrimmage to the backfield, or split out as receivers.’
    1. 1.1 The players (quarterback and running backs) positioned in this area.
      • ‘When it comes to the offensive backfield, they take a back seat to no team in the SEC.’
      • ‘After taking a handoff deep in the backfield from the quarterback, the tailback picks a hole based on the blocking in front of him.’
      • ‘An effective run stuffer, he also can get into the backfield and pressure the quarterback.’
      • ‘They entered the offseason with a depleted defensive backfield, so adding a quality cornerback or safety is likely.’
      • ‘He has shown the versatility throughout his career to play any position in the defensive backfield.’

Pronunciation:

backfield

/ˈbakfiːld/