say it: ROWN-duhd
rounded is an adjective meaning "curving and somewhat round in shape rather than jagged". It carries one recorded sense.
curving and somewhat round in shape rather than jagged
“low rounded hills”
“rounded shoulders”
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 rounded 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.