The story
From pigeonhole + -s (suffix forming regular plurals of nouns and pluralia tantum; and third-person singular simple present indicative forms of verbs).
Etymology from Wiktionary, CC BY-SA 4.0.
pigeonholes
pi·geon·holesToday it means: An outdoor game played in the 17th and early 18th centuries in which each player bowls a ball towards targets (probably small compartments). Full definition →