The straight segment of a racetrack leading to the finish line.
2.
Hence: (fig.) The last or concluding part of any extended activity that has a definite conclusion; the final phase of any activity; as, the election was neck-and-neck in the homestretch.
... Tim led by fifty feet, and, running swiftly, maintaining the same lead, he came down the homestretch an easy winner. When directly beneath the group on the hillside, the incredible and unthinkable happened. Standing close to the inside edge of the track was a dapper young man with a light switch cane. He was distinctly out of place in such a gathering, for upon ... — The Valley of the Moon • Jack London Read full book for free!