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noun Escalator n. A stairway or incline arranged like an endless belt so that the steps or treads ascend or descend continuously, and one stepping upon it is carried up or down; originally a trade term, which has become the generic name for such devices. Such devices are in common use in large retail establishments such as department stores, and in public buildings having a heavy traffic of persons between adjacent floors.
Collaborative International Dictionary of English 0.48
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