Definition of "glade"

[…] are creating more "glades," or cleared trails through the woods, for less experienced (blue) skiers. They're a throwback to the first days of skiing, before resorts cut wide swaths of trees, and machines rolled and packed the snow.

2003, Newsweek, Travel: In The Trees, Nov 23, 2003

[…] and meads and glades so eternally vernal, that the grass shot up by the spring, untrodden, unwilted, remains at midsummer.

1851 November 14, Herman Melville, “chapter 22”, in Moby-Dick; or, The Whale, 1st American edition, New York, N.Y.: Harper & Brothers; London: Richard Bentley