milestone /ˈmajəlˌstoʊn/ noun plural milestones
plural milestones
Learner's definition of MILESTONE
[count]
1
: a stone by the side of a road that shows the distance in miles to a specified place里程碑
2
: an important point in the progress or development of something : a very important event or advance重要事件;重要阶段;里程碑 —
usually + in