mil ‧ li ‧ me ‧ tre S3 BrE AmE British English , millimeter American English /ˈmɪləˌmiːtə, ˈmɪlɪˌmiːtə $ -ər/ noun [countable] ( written abbreviation mm )
a unit for measuring length. There are 1,000 millimetres in one metre.
MILLIMETRE
Meaning of MILLIMETRE in English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012