n. 1. A stone serving the same purpose as a milepost. [ 1913 Webster ]
2. An event or accomplishment marking a significant advance in an endeavor; a notable achievment; as, putting a man in orbit was a major milestone on the way to the moon. Syn. -- milepost. [ PJC ]
English-Thai: NECTEC'sLexitron-2 Dictionary [with local updates] NECTEC Lexitron Dictionary EN-TH
But one day you're gonna wake up, and all the big stuff, all the milestones you been looking forward to, graduations, weddings, having kids, your grandkids, it's all behind you.