Merriam-Webster Collegiate Dictionary - mow

 I. noun  Etymology: Middle English, heap, stack, from Old English muga; akin to Old Norse mugi heap  Date: before 12th century  1. a piled-up stack (as of hay or fodder); also a pile of hay or grain in a barn  2. the part of a barn where hay or straw is stored  II. verb  (~ed; ~ed or ~n; ~ing)  Etymology: Middle English, from Old English mawan; akin to Old High German maen to ~, Latin metere to reap, ~, Greek aman  Date: before 12th century  transitive verb  1.  a. to cut down with a scythe or sickle or machine  b. to cut the standing herbage (as grass) of  2.  a.  (1) to kill or destroy in great numbers or mercilessly machine guns ~ed down the enemy  (2) to cause to fall ; knock down  b. to overcome swiftly and decisively ; rout ~ed down the opposing team  intransitive verb to cut down standing herbage (as grass)  • ~er noun  III. noun  Etymology: Middle English ~e, from Anglo-French mouwe, of Germanic origin; akin to Middle Dutch mouwe protruding lip  Date: 14th century grimace  IV. intransitive verb  Date: 15th century to make grimaces