The remote control contains mode selections for standing, walking, sitting, and stair up and down modes that the user can select.
The smiling president immediately joked with the crowd, “I was so fired up, I missed a stair!”
We sprang up a stair, and went all over the house, to find no one.
Probably then the stair and the room below had been an arrangement for the musicians.
She went down the stair into the well, winding out of sight, and as long as I could see her, her eyes were watching mine.
Going higher yet, till she all but reached the roof, the stair brought her to a door.
stair, who expected as much, took also his measures, which were within an inch of succeeding; for this is what happened.
The major took him again, and carried him up the stair—so thin and light was he.
They had found a little door at the foot of the stair, which opened easily.
And the professor turned toward the stair, but paused at the bottom step.
Old English stæger "flight of steps," also "a single step," from Proto-Germanic *staigri (cf. Old Norse and Old Frisian stiga, Middle Dutch stighen, Old High German stigan, German steigen, Gothic steigan "to go up, ascend;" Old English stigan "to climb, go;" German Steig "path," Old English stig "narrow path"), from PIE *steigh- "go, rise, stride, step, walk" (cf. Greek steikhein "to go, march in order," stikhos "row, line, rank, verse;" Sanskrit stighnoti "mounts, rises, steps;" Old Church Slavonic stignati "to overtake," stigna "place;" Lithuanian staiga "suddenly;" Old Irish tiagaim "I walk;" Welsh taith "going, walk, way").
Originally also a collective plural; stairs developed by late 14c. OED says stair still is ordinary in Scotland where flight of stairs would be used elsewhere.