ECRU Meaning of ECRU in English e ‧ cru /ˈeɪkruː, ˈek-/ BrE AmE noun [uncountable] [ Date: 1800-1900 ; Language: French ; Origin: écru 'not made white' ] a pale brown colour —ecru adjective Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012