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Classic usage
Reading level: hard
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English slot, from Old French esclot, likely from Old Norse slóð (“track”). As a gambling machine, via clipping of slot machine. Compare sleuth. The scheduling (calendar) sense is by a metaphor whereby the time span is equated with the segment of a page or part of a device that represents it.
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Classic usage
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