/
ˌɛspləˈneɪd,
-ˈnɑːd/
n.
a long, open, level area, typically beside the sea, along which people may walk for pleasure.
▸an open, level space separating a fortress from a town.
Etymology
C16: from Fr., from Ital. spianata, from L. explanatus ‘levelled’, from explanare (see explain).