Rare; chiefly in project management: to schedule or mark a stage (milestone) in a plan.
Definitions
To schedule, designate, or mark with milestones in order to track progress. The team will milestone each phase to ensure timely delivery.
Used attributively before a noun to denote that something is highly significant or marks an important stage.
Definitions
Denoting or relating to a significant or pivotal stage, event, or achievement. The milestone agreement paved the way for lasting peace.