instillment instiller • instinct · · · Info · Definitions · Synonyms · Characters · · instillment · · Text Latin · · Script 11 · · Length Definitions · · · (noun) the introduction of a liquid (by pouring or injection) drop by drop. Synonyms: instillation, instilment. · · Noun Definition 1 Synonyms · · · instillation · · Synonym 1 instilment · · Synonym 2 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074