MARKDOWN Meaning of MARKDOWN in English mark ‧ down /ˈmɑːkdaʊn $ ˈmɑːrk-/ BrE AmE noun [countable] a reduction in the price of something ⇨ mark downmarkdown of a markdown of 15% Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012