Meaning of nook-shaft in English:

nook-shaft

Pronunciation /ˈnʊkʃɑːft/ /ˈnʊkʃaft/

noun

Architecture
  • In Romanesque and Gothic architecture: a shaft set in the angle formed by the orders of a compound pier or arch or in the jambs of a doorway or window.

Origin

Mid 19th century; earliest use found in Robert Willis (1800–1875), engineer and architectural historian. From nook + shaft.