say it: SIR-ee-uhl
cereal is a noun and adjective meaning "grass whose starchy grains are used as food: wheat; rice; rye; oats; maize; buckwheat; millet". It carries 4 recorded senses.
a breakfast food prepared from grain
made of grain or relating to grain or the plants that produce it
“a cereal beverage”
“cereal grasses”
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 cereal 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.