The Collaborative International Dictionary of English v.0.48:

Din \Din\, v. t. [imp. & p. p. Dinned; p. pr. & vb. n.
   Dinning.] [AS. dynian. See Din, n.]
   1. To strike with confused or clanging sound; to stun with
      loud and continued noise; to harass with clamor; as, to
      din the ears with cries.
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   2. To utter with a din; to repeat noisily; to ding.
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            This hath been often dinned in my ears. --Swift.
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   To din into, to fix in the mind of another by frequent and
      noisy repetitions. --Sir W. Scott.
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