The term "English" can refer to several different meanings depending on context.
1) It could refer to the language spoken in England, which is also known as British English or simply English. This is one of the most widely spoken languages in the world and has evolved from Old English spoken in early medieval times to Modern English that we use today.
2) Alternatively, "English" can be used to describe something related to England such as its culture, history, literature, or people. For example, someone might say they are studying English Literature which would mean they are learning about the literary works and authors from England.
3) In a historical context, "English" could refer to the ethnic group that originated in England and is known as Anglo-Saxons. These people were the ancestors of many people who live in countries such as United States, Canada, Australia, and New Zealand among others.