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Simplon

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WordReference Random House Unabridged Dictionary of American English © 2026

Sim•plon n.

Place Namesa mountain pass in S Switzerland, in the Lepontine Alps: crossed by a carriage road constructed 1800–06 on Napoleon's orders. 6592 ft. (2010 m) high.
Place Namesa tunnel between Switzerland and Italy, NE of the Simplon Pass: longest tunnel in the world. 12¼ mi. (20 km) long.

'Simplon' also found in these entries (note: many are not synonyms or translations):

Simplon Pass - St. Bernard

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