[n] a series of rapid tapping sounds; "she missed the pitter-patter of little feet around the house"
[adv] describing a rhythmic beating; "his heart went pit-a-pat"
[adv] as of footsteps; "he came running pit-a-pat down the hall"
[v] make light, rapid and repeated sounds, as of rain
[v] rain gently; "It has only sprinkled, but the roads are slick"