cum /kʊm, kʌm/ prepositionprep → comeWITHused between two nouns to show that something has two purposes 兼,两用〔用于两个名词之间〕 a kitchen-cum-dining room 厨房兼饭厅
a lunch-cum-business meeting 商务午餐会
cum• a bookstore-cum-coffeehouse
From Longman Business Dictionary
cumcum /kʊm, kʌm/ adverbadvFINANCE1cum dividend/cum div when the price of shares is listed cum dividend or cum div, the person who buys them will receive the next DIVIDEND payment on themWe can claim any trading losses made by buying stock cum dividend and then selling it ex-dividend against our tax liability.