1.TTDISTANCEa post next to a road or railway that shows the distance in miles to the next town 〔公路或铁路旁用英里显示下一城镇距离的〕里程标
2.a milestone(1) 重大事件，里程碑
Examples from the Corpus
milepost• Far from being a defeat, Reykjavik was a milepost, a turning point in disarmament negotiations.• Victoria and I have undoubtedly passed that milepost.