I checked Longman Dictionary and there are three definition for "Seasoned":
1 [only before noun] used to describe someone who has a lot of experience of a particular thing
2 seasoned food has salt, pepper etc added to it
3 seasoned wood has been prepared for use by drying
However I do not understand meaning of the phrase.
Could you please tell me what the meaning of "Seasoned as old leather" is?
The full text is here:
When Grandpa-down-the-hill was a young man, there’d been herds of livestock spread across the mountain, and they were tended on horseback. Grandpa’s ranching horses were the stuff of legend. Seasoned as old leather, they moved their burly bodies delicately, as if guided by the rider’s thoughts.