say it: GRID-ahy-urn
gridiron is a noun meaning "a cooking utensil of parallel metal bars; used to grill fish or meat". It carries 2 recorded senses.
a cooking utensil of parallel metal bars; used to grill fish or meat
the playing field on which football is played
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for gridiron come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.