From Longman Dictionary of Contemporary Englishsoundcardsound‧card, sound card /ˈsaʊndkɑːd $ -kɑːrd/ noun [countable] a circuit board that can be added to a computer so that it is able to produce soundFrom Longman Business Dictionarysoundcardsound‧card /ˈsaʊndkɑːd-kɑːrd/ noun [countable] COMPUTING a part of a computer that makes it able to produce sound
