Definition of clerestory in US English:

clerestory

(also clearstory)

noun

  • 1The upper part of the nave, choir, and transepts of a large church, containing a series of windows. It is clear of the roofs of the aisles and admits light to the central parts of the building.

    • ‘Highlights of these volumes are the windows of the choir clerestory, and the tracery lights of various chapels and of the chapter house.’
    • ‘The last major alteration was made soon afterwards when a clerestory was built above the nave arcades.’
    • ‘Standing above the river Trent is St Wystan's Church, much of which is of the mid-C14 and C15 including the tower and spire, clerestory, and roof.’
    • ‘Just one of his guiding principles, that nothing should be built higher than the clerestory of the Minster, has insured that it remains a resolutely low-rise city.’
    • ‘Light pours down at the ceremonial end from an unseen clerestory set into the roof where it steps up to offer nobility.’
    1. 1.1 The windows in the clerestory of a church or similar windows in another building.
      • ‘A great deal of time is spent studying the sun's seasonal angles, capturing or controlling it with clerestories and tilted roof planes.’
      • ‘A cove-lit ceiling vault braced with polished steel rods is dramatically cut away to reveal a steel-framed butterfly roof and clerestory that survive from the original factory.’
      • ‘The main gable roof, with its clerestories and secondary skillions, is clad in a specially rolled profile.’
      • ‘The roundhouse was red sandstone brick with graceful arches over most of the ten stalls and a corrugated metal roof adorned with a ventilated clerestory.’
      • ‘To solve this problem, the architects raised the central portion of the roof to create clerestories that can illuminate any classroom configuration.’
    2. 1.2 A raised section of roof running down the center of a railroad car, with small windows or ventilators.
      • ‘The four-wheel clerestory roof planked side Sachsen coach will be in original red livery.’
      • ‘Externally the cars have clerestory roofs.’
      • ‘If you decide to glue the roof in place now, install the correct clerestory vent sides, depending on whether your car had air conditioning or not in the period you're modeling.’

Origin

Late Middle English: from clear + storey.

Pronunciation

clerestory

/ˈklirˌstôrē//ˈklɪrˌstɔri/