Definition of milecastle in English:

milecastle

noun

  • Each of a series of small fortified posts established by the Romans at intervals (typically of one Roman mile) along Hadrian's Wall in northern England.

Origin

Early 18th century. From mile + castle.

Pronunciation

milecastle

/ˈmʌɪlˌkasl//ˈmʌɪlˌkɑːsl/