say it: GRAY-tur
grater is a noun meaning "utensil with sharp perforations for shredding foods (as vegetables or cheese)". It carries one recorded sense.
utensil with sharp perforations for shredding foods (as vegetables or cheese)
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 grater 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.