A pigeon hole is a small compartment in a pigeon house or dovecote where a single pigeon can roost or nest. It can also be used to refer to a small, cramped space or a niche or category that something or someone fits into. For example, you might say that someone is "pigeon-holed" into a certain role or position.
Here is an example of pigeon hole:
* Pigeon hole: A small, cramped space in a pigeon house or dovecote where a single pigeon can roost or nest.
* Example: The pigeon holes in the dovecote were lined with straw to make them more comfortable for the pigeons.