Search Result for "tiered seat":
Wordnet 3.0

NOUN (1)

1. seating that is arranged in sloping tiers so that spectators in the back can see over the heads of those in front; 



WordNet (r) 3.0 (2006):

tiered seat
    n 1: seating that is arranged in sloping tiers so that
         spectators in the back can see over the heads of those in
         front