add-in addiment • adding machine · · · Info · Definitions · Synonyms · Characters · · add-in · · Text Common · · Latin · · Scripts 6 · · Length 2 · · Syllables Definitions · · · (noun) a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities. Synonyms: circuit board, circuit card, board, card, plug-in. · · Noun Definition 1 Synonyms · · · circuit board · · Synonym 1 circuit card · · Synonym 2 board · · Synonym 3 card · · Synonym 4 plug-in · · Synonym 5 Characters · · - hyphen-minus U+002D a latin small letter a U+0061 d latin small letter d U+0064 i latin small letter i U+0069 n latin small letter n U+006E