"escalator" in the noun sense
1. escalator clause, escalator
a clause in a contract that provides for an increase or a decrease in wages or prices or benefits etc. depending on certain conditions (as a change in the cost of living index)
2. escalator, moving staircase, moving stairway
a stairway whose steps move continuously on a circulating belt
Source: WordNet® (An amazing lexical database of English)
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