An English person or person of English ancestry.
Back when we went to the World Cup in South Africa, we saw many anglos waving English flags.
(sometimes offensive) an American, especially a white one (regardless of actual ethnicity), whose native language is English (as opposed to Americans for who have another native language).
I'm not an "anglo"; my grandparents are from Lithuania.
An Anglo-Australian (as opposed to Australians of Mediterranean or Middle Eastern background).
An English-speaking Quebecer.
A white-skinned person.
A British person or person of British ancestry.