a fortified Roman wall, of which substantial parts remain, extending across N England from the Solway Firth in the west to the mouth of the River Tyne in the east. It was built in 120–123 ad on the orders of the emperor Hadrian as a defence against the N British tribes
Hadrian's Wall in American English
stone wall across N England, from Solway Firth to the Tyne: built ( a.d. 122-128) by Hadrian to protect Roman Britain from N tribes: 73.5 mi (118.3 km)