A seat in a theater-box, or on the box of a coach.(noun)
The Century Dictionary (Public Domain)
Use "box-seat" in a sentence
"He assured himself that no detail was amiss in the harnessing and hitching, and reseated the party, insisting on Graham coming forward into the box-seat beside Paula."
"In the stands Special Agent Rafferty is walking down the stairs to the box-seat area behind the home team dugout."
"Leyland then slapped high-fives with fans along the box-seat railings before taking part in the festivities in the middle of the field."