Noun gridiron has 2 senses
  1. grid, gridiron - a cooking utensil of parallel metal bars; used to grill fish or meat
    --1 is a kind of cooking utensil, cookware
  2. football field, gridiron - the playing field on which football is played
    --2 is a kind of playing field, athletic field, playing area, field
    --2 is a part of football stadium
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