milestone

Từ điển Oxford Advanced Learner 8th

mile·stone [milestone milestones] BrE [ˈmaɪlstəʊn] NAmE [ˈmaɪlstoʊn] noun
1. (also mile·post especially in NAmE)a very important stage or event in the development of sth
Syn: ↑landmark
•This voyage marked an important milestone in the history of exploration.
•Today we have passed another milestone on the road towards peace.
2. a stone by the side of a road that shows how far it is to the next town and to other places
See also: ↑milepost

Example Bank:
•The company passed the £6 million milestone this year.
•The film proved to be a milestone in the history of cinema.
•a milestone for Chinese technology
•another grim milestone in the war