milestonePronunciation: /ˈmʌɪlstəʊn/Translate milestone | into French | into German | into Italian | into Spanish Definition of milestone noun 1a stone set up beside a road to mark the distance in miles to a particular place. 2a significant stage or event in the development of something:the speech is being hailed as a milestone in race relationsmilestone in other Oxford dictionaries Definition of milestone in the US English dictionary
