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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From inter- + state, originally as an adjective only; the noun is by (ellipsis) from interstate highway. The noun also serves adjectivally as a (noun adjunct) in such collocations as interstate construction and interstate rest stops.
interstate highway
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tap / space
Classic usage
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