Main Entry: stair

Pronunciation: \ˈster\

Function: noun

Etymology: Middle English steir, from Old English stǣger; akin to Old English & Old High German stīgan to rise, Greek steichein to walk

Date: before 12th century

1 : a series of steps or flights of steps for passing from one level to another —often used in plural but singular or plural in construction <a narrow private stairs — Lewis Mumford>
2 : a single step of a stairway