Pigeon hole is a term used to describe a sorting system or method of organizing items into categories. It is derived from the physical pigeon holes used to store and organize documents. The term can also be used metaphorically to refer to a situation where items are sorted into a limited number of categories. The crossword solutions for the term Pigeon Hole are SORT (4 letters), SLOT (4 letters) and NICHE (5 letters). SORT is a verb meaning to arrange items into categories, SLOT is a noun referring to a narrow opening or compartment, and NICHE is a noun meaning a specialized position or activity.