1n. a fox trap built of blocks of snow and baited, the fox jumping in after the bait but being unable to jump out again.
1856  Now, then, what say you to going farther out on the river, and making a snow trap for white foxes?
2n. a number of trees, bushes, etc. left standing to trap drifting snow. See quote.
1962  Lots of it will be left for cover, not primarily for game birds but because it is needed for shelter for his stock, for snow traps for moisture and to control run-off. But the wildlife will greatly benefit.