informant informally • information · · · Info · Definitions · Synonyms · Characters · · informant · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a person who supplies information. Synonyms: source. · · Noun Definition 1 (noun) someone who sees an event and reports what happened. Synonyms: witness, witnesser. · · Noun Definition 2 Synonyms · · · source · · Synonym 1 witness · · Synonym 2 witnesser · · Synonym 3 Characters · · a latin small letter a U+0061 f latin small letter f U+0066 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074