staircase Meaning, Definition & Usage

  1. noun a way of access (upward and downward) consisting of a set of steps
    stairway.

WordNet

Stair"case` noun
Definitions
  1. A flight of stairs with their supporting framework, casing, balusters, etc.
    To make a complete staircase is a curious piece of architecture. Sir H. Wotton.

Webster 1913