stepladder
/ˈstɛpˌlædər/
noun
- A portable ladder with flat steps and a hinged frame that can stand on its own, used for reaching high places.
- The painter set up a stepladder to reach the top of the wall.
- She used a stepladder to change the light bulb in the ceiling.
- Always make sure the stepladder is fully open and locked before climbing.