firm up firm omelet • firm-based · · · Info · Definitions · Characters · · firm up · · Text Common · · Latin · · Scripts 7 · · Length 2 · · Syllables Definitions · · · (verb) arrange firmly. Synonyms: firm up. Example: "Firm up one's plans." · · Verb Definition 1 Characters · · space U+0020 f latin small letter f U+0066 i latin small letter i U+0069 m latin small letter m U+006D p latin small letter p U+0070 r latin small letter r U+0072 u latin small letter u U+0075