say it: thrawngd
thronged is an adjective meaning "filled with great numbers crowded together". It carries one recorded sense.
filled with great numbers crowded together
“I try to avoid the thronged streets and stores just before Christmas”
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 thronged 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.