Snow  —n. 1 frozen atmospheric vapour falling to earth in light white flakes. 2 fall or layer of this. 3 thing resembling snow in whiteness or texture etc. 4 slang cocaine. —v. 1 (prec. By it as subject) snow falls (it is snowing; if it snows). 2 (foll. By in, over, up, etc.) Confine or block with snow.  be snowed under be overwhelmed, esp. With work. [old english]