pea-souper pea-soup • peat bank · · · Info · Definitions · Synonyms · Characters · · pea-souper · · Text Common · · Latin · · Scripts 10 · · Length Definitions · · · (noun) a heavy thick yellow fog. Synonyms: pea soup. · · Noun Definition 1 Synonyms · · · pea soup · · Synonym 1 Characters · · - hyphen-minus U+002D a latin small letter a U+0061 e latin small letter e U+0065 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075