pigeonhole

noun

1. a small recess or hole for pigeons to nest in, usually in a compartmented structure
2. a small open compartment, as in a desk, for filing papers

transitive verb pigeonholed, pigeonholing

1. to put in the pigeonhole of a desk, etc.
2. to put aside indefinitely, as if intending to ignore or forget; shelve
3. to assign to a category or categories; classify