A "meadow" is not something in a forest. It is a "grassy field" and is open (no trees). It may be very large (more than a kilometer) or smaller, but is not as small as 5m.Hello,
For a long time i can not figure out the difference between meadow, glade and gap.
And how americans call a small open area in the middle of forest (less than a 5 m in diameter)? (where people make camps)
A "glade" is an open space in a forest. But I have no idea how large it is. I had to look up the word to know it was an "open space" -- I just knew it was some part of a forest.
That is my experience as well. Breaks in mountains often have regional names that are not familiar to people from other areas unless they have read a lot about hiking in mountains. In Vermont, gap is common (see this list), but in nearby New Hampshire, it is a notch (see this list). It can also be a col (especially in Europe), a pass (generally used in the Western U.S.) and a few other things. I agree with GWB that this is the only meaning that applies in the context of a forest.In my own experience of the northeastern US, and particularly ridge-and-valley province of Pennsylvania, a "gap" has nothing to do with a clearing in a forest, and is instead a break in a mountain wall, usually related to the flow of a watercourse. Examples include the gaps found at Wind Gap, Fort Indiantown Gap, Rausch Gap, and plain old Gap, which is familiar to anyone who has ever taken the train from New York or Philadelphia to Harrisburg. By far the best-known gap of this kind, however, is the Delaware Water Gap, on the border of Pennsylvania and New Jersey.