n.
Function: transitive verb
Date: 1840
1 a : to place in or as if in the pigeonhole of a desk b : to lay aside : SHELVE <his reports continued to be pigeonholed and his advice not taken ― Walter Mills>
2 : to assign to an often restrictive category : CLASSIFY
– pi · geon · hol · er \ - ˌ h ō -l ə r \ noun