v.1. To cause something to be inoperable or unable to move safely due to snow. Used chiefly in the passive: The airport was snowed in, and no flights left that day. The school buses were snowed in, so classes were canceled.
2. To cause someone or something to remain inside due to snow: The blizzard had snowed in all the townspeople, and all the restaurants were closed. A sudden storm had snowed us in, and we were worried that we would run out of food.
3. To cause something to be surrounded by snow: The storm snowed in the mountain and confined the climbers to their tents. One winter, a blizzard snowed their cabin in, and they had to tunnel out the window.