Proper noun
A village and civil parish in East Devon district, Devon, England, the site of Membury Castle (OS grid ref ST2703).
A hamlet in Ramsbury parish, north-east Wiltshire, England (OS grid ref SU3074); Membury services on the M4 motorway are nearby, but across the county boundary in West Berkshire. The site of Membury Camp is also nearby.
Source: en.wiktionary.org