londinium Definition

city and port on both sides of the Thames River in southeastern England; capital of the United Kingdom formerly constituting an administrative county; comprises the City of London or informally The City (approximately coextensive with ancient Londinium; population 7400) and 32 other boroughs, which together are referred to as the metropolitan county of Greater London (area 632 square miles, or 1637 square kilometers, population 8,174,000)

city on the Thames River in southeastern Ontario, Canada population 366,151