The Collaborative International Dictionary of English v.0.48:

Strum \Strum\, v. t. & i. [imp. & p. p. Strummed; p. pr. & vb.
   n. Strumming.] [Probably of imitative origin. Cf. Thrum.]
   To play on an instrument of music, or as on an instrument, in
   an unskillful or noisy way; to thrum; as, to strum a piano.
   [1913 Webster]

WordNet (r) 3.0 (2006):

strum
    n 1: sound of strumming; "the strum of a guitar"
    v 1: sound the strings of (a string instrument); "strum a
         guitar" [syn: strum, thrum]

U.S. Gazetteer Places (2000):

Strum, WI -- U.S. village in Wisconsin
   Population (2000):    1001
   Housing Units (2000): 434
   Land area (2000):     1.087200 sq. miles (2.815834 sq. km)
   Water area (2000):    0.082129 sq. miles (0.212713 sq. km)
   Total area (2000):    1.169329 sq. miles (3.028547 sq. km)
   FIPS code:            77825
   Located within:       Wisconsin (WI), FIPS 55
   Location:             44.550388 N, 91.391904 W
   ZIP Codes (1990):     54770
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Strum, WI
    Strum