Definition of escalator noun from the Oxford Advanced Learner's Dictionary

 

escalator

 noun
noun
BrE BrE//ˈeskəleɪtə(r)//
 
; NAmE NAmE//ˈeskəleɪtər//
 
House equipment, In the store
 
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moving stairs that carry people between different floors of a large building See related entries: House equipment, In the store Word Origin early 20th cent. (originally US, as a trade name): from escalade ‘climb a wall by ladder’ (from the noun escalade), on the pattern of elevator.Extra examples Passengers are carried by escalator to the first floor. Take the escalator down to the lower level. We rode the escalator up toward our restaurant. kids running up a down escalator
See the Oxford Advanced American Dictionary entry: escalator