Also, on one's way. In the process of coming, going, or traveling; also, about to come. For example, The mail plane is on the way, or She is on her way out the door, or Winter is on the way.
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On the route of a journey, as in I met him on the way to town, or We ran into them on the way. [ c. a.d. 1000 ]
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on the way to; well on the way to. On the point of experiencing or achieving, as in James is on the way to becoming a full professor, or Nancy is well on her way to a nervous breakdown. [ Late 1800s ]