Noun has 1 sense

• pitter-patter(n = noun.event) - a series of rapid tapping sounds; "she missed the pitter-patter of little feet around the house"

Derived form verb pitter-patter₂

Verb has 2 senses

• pitter-patter(v = verb.weather) patter, spatter, spit, sprinkle - rain gently; "It has only sprinkled, but the roads are slick"

Sample sentence:
It is ----ing

• pitter-patter(v = verb.perception) patter - make light, rapid and repeated sounds; "gently pattering rain"

Derived form noun pitter-patter₁
Sample sentences:
Somebody ----s PP
Something ----s

Adverbial has 2 senses

• pitter-patter(r = adv.all) pit-a-pat, pitty-pat, pitty-patty - as of footsteps; "he came running pit-a-pat down the hall"
• pitter-patter(r = adv.all) pit-a-pat, pitty-pat, pitty-patty - describing a rhythmic beating; "his heart went pit-a-pat"