Original: Anglo-Saxons (or Anglo-Saxon) is the term usually used  to describe the invading tribes in the south and east of Great Britain from the early 5th century AD, and their creation of the English nation, to the Norman conquest of 1066.
Simplified: Anglo-Saxon means usually the culturally and linguistically similar peoples living in the south and east of the island Great Britain (modern England) from around the mid-5th century AD to the Norman conquest of 1066.