pigeonhole >> /ˈpɪdʒənˌhoʊl/
Definition: [transitive verb] Deposit (a document) into a pigeonhole.
Example: he pigeonholed his charts and notes
Definition: [noun] A small recess for a domestic pigeon to nest in.
Example: It's fortunate that they set up those pigeonholes because some of the pigeons have come home to roost.
Definition: [noun] A small compartment, open at the front and forming part of a set, where letters or messages may be left for individuals.
Example: Every morning I'd check my pigeonhole in case the letter had finally arrived telling me that a distant relative had died and I was now the heir to a title and a vast estate.
Definition: [noun] A category, typically an overly restrictive one, to which someone or something is assigned.
Example: people identified me with a homely farmer's wife and I was never allowed to escape from that pigeonhole