What does the word inroad mean?

Usage examples for inroad

  1. Within the memory of man the sea has made an inroad of nearly, if not quite, a mile from its former high- water mark. – Recollections of Old Liverpool by A Nonagenarian
  2. They were so dependent on what they earned that these serious interruptions to work threatened an inroad on their small capital. – Audrey Craven by May Sinclair
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