fatten fattable • fattenable · · · Info · Definitions · Synonyms · Characters · · fatten · · Text Latin · · Script 6 · · Length Definitions · · · (verb) make fat or plump. Synonyms: fat, flesh out, fill out, plump, plump out, fatten out, fatten up. Examples: "We will plump out that poor starving child." · · Verb Definition 1 Synonyms · · · fat · · Synonym 1 flesh out · · Synonym 2 fill out · · Synonym 3 plump · · Synonym 4 plump out · · Synonym 5 fatten out · · Synonym 6 fatten up · · Synonym 7 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 f latin small letter f U+0066 n latin small letter n U+006E t latin small letter t U+0074