[n] athletic facility equipped for sports or physical training [n] a school for students intermediate between elementary school and college; usually grades 9 to 12
gym, lycee, lyceum, middle school, secondary school
agora, amphitheater, archery ground, arena, athletic field, auditorium, background, badminton court, baseball field, basketball court, bear garden, billiard parlor, bowl, bowling alley, bowling green, boxing ring, bull ring, campus, canvas, circus, cockpi