From Longman Business Dictionarymid-cap shareˈmid-cap ˌshareor mid-capitalization share (also mid-capitalisation share British English) [countable]FINANCEa share in a company with a mediumamount of SHARE CAPITAL (=total share value)SYNMID-CAPIn Paris in recent weeks, mid-cap shares have lagged behind the CAC-40 index of major companies. →share
