Source : Webster's Revised Unabridged Dictionary (1913)

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.

   2. To utter with a din; to repeat noisily; to ding.

            This hath been often dinned in my ears. --Swift.

   {To din into}, to fix in the mind of another by frequent and
      noisy repetitions. --Sir W. Scott.