Definition of one-inch in English:

one-inch

Pronunciation /ˈwʌnɪn(t)ʃ/

adjective

(also 1-inch)
  • 1Measuring or involving a distance of one inch.

  • 2Of a map: having a scale of one inch to one mile (1:63,360).

noun

(also 1-inch)
  • A one-inch map.

Origin

Late 17th century. From one + inch.