say it: WAW-tur-mel-uhn
watermelon is a noun meaning "an African melon". It carries 2 recorded senses.
an African melon
large oblong or roundish melon with a hard green rind and sweet watery red or occasionally yellowish pulp
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 watermelon 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.