treater treatee • treating · · · Info · Definitions · Synonyms · Characters · · treater · · Text Latin · · Script 7 · · Length Definitions · · · (noun) someone who negotiates (confers with others in order to reach a settlement). Synonyms: negotiator, negotiant. · · Noun Definition 1 Synonyms · · · negotiator · · Synonym 1 negotiant · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 r latin small letter r U+0072 t latin small letter t U+0074