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Meaning of Twin Tiers | Babel Free

Noun CEFR B2

Definitions

Those counties that lie on the New York-Pennsylvania border on either side of the 42nd parallel north.

US

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

twin tip Twin Towers twin town twin tub twin XL twin-cam