Focus on the pronunciation of milestone
English definition of “milestone”
/ˈmaɪlstəʊn/ noun [C]
› (also milepost) an important event in the development or history of something or in someone's life: The opening of a branch in New York represented an important milestone for the company.a milestone in sth They described the discovery as 'a milestone in medical research'.
› a time when a piece of work must be finished or something must be achieved: In Monday mornings, we would set milestones for the week. If they don't meet the first milestone, you withdraw support.