From Longman Dictionary of Contemporary EnglishNASDAQNASDAQ /ˈnæzdæk/ trademark (National Association of Securities Dealers Automated Quotations) a system giving the prices of shares in smaller and newer companies that are bought and sold directly between dealers on a national computer network rather than on a stockmarketFrom Longman Business DictionaryNasdaqNas‧daq /ˈnæzdæk/ noun trademark National Association of Securities Dealers Automated Quotations; a system giving the prices of shares in smaller and newer companies that are traded OVER THE COUNTER (=directly between dealers on a national computer network rather than on a stockmarket) in the US. Nasdaq is officially known as the Nasdaq Stock Exchange