noun
The ordinary physical meaning: a ladder used for climbing up or down. In modern writing, はしご is more common than the kanji spelling.
はしごを壁に立てかけた。
I leaned the ladder against the wall.
屋根に上るには長い
You need a long ladder to get up onto the roof.
noun
stairs; ladder-like steps
A less central use referring to stairs or steps, especially when they are steep or ladder-like; in ordinary modern Japanese, 階段 is the normal word for stairs.
古い小屋には、二階へ上がる急なはしごがあった。
The old hut had steep ladder-like stairs leading up to the second floor.
noun, noun or participle which takes 'suru', transitive verb, intransitive verb
go to several places in succession; barhop
Used as はしごする or Nをはしごする for visiting several places one after another. It is especially common for bars and restaurants, but can also be used for shops, hospitals, and other destinations.
昨夜は友達と居酒屋を三軒はしごした。
Last night I went barhopping with a friend, visiting three izakaya.
セールの日は、朝から店をはしごするつもりだ。
On the day of the sale, I plan to go from store to store starting in the morning.