Definitions

1. noun

A step or flight of steps, especially in a building, used for going up or down.

“She climbed the stairs to her bedroom.”

2. noun

A step or rung of a ladder or staircase.

“He stepped up the stair to change the light bulb.”

3. verb

To climb or ascend on stairs, especially for a short distance.

“She will stair up to the top floor to get some fresh air.”

4. verb

To go up on stairs, especially in a building.

“He will stair to the office to meet with his boss.”