Definition from Wiktionary, the free dictionary
- Damaged or eroded by the weather.
1915, James Oliver Curwood, The Hunted Woman:
- His hair, gray as the underwing of the owl whose note he forged, straggled in uncut disarray from under the drooping rim of a battered and weatherworn hat.
1920, Earl Wayland Bowman, The Ramblin' Kid:
- Old Heck said again, his weatherworn features working convulsively, "it's more than a mortal man can endure and stand!"