Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A flight or series of flights of steps and a supporting structure connecting separate levels.

from The Century Dictionary.

  • noun The part of a building which contains the stairs: also often used for stairs or flight of stairs. Staircases are straight or winding. The straight are technically called fliers or direct fliers.

from the GNU version of the Collaborative International Dictionary of English.

  • noun A flight of stairs with their supporting framework, casing, balusters, etc.
  • noun (Zoöl.) Any species of Solarium, or perspective shell.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun a flight of stairs; a stairway
  • noun a connected set of flights of stairs; a stairwell

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a way of access (upward and downward) consisting of a set of steps

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

stair + case

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