#1 pitter-patter n. a series of rapid tapping sounds; "she missed the pitter-patter of little feet around the house". wn
#2 pitter-patter v. [sprinkle, spit, spatter, patter] rain gently; "It has only sprinkled, but the roads are slick". wn
#3 pitter-patter r. [pit-a-pat, pitty-patty, pitty-pat] as of footsteps; "he came running pit-a-pat down the hall". wn
#4 pitter-patter v. [patter] make light, rapid and repeated sounds; "gently pattering rain". wn
#5 pitter-patter r. [pit-a-pat, pitty-patty, pitty-pat] describing a rhythmic beating; "his heart went pit-a-pat". wn
vizzz