D defs.my
Entry 1 sense Webster, 1913

Strum

/strŭm/ · IPA /strʌm/
01 v. t. & i. 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.
imp. & p. p. Strummed; p. pr. & vb. n. Strumming
  1. 1.
    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.