What is the meaning of They?

A group of entities previously mentioned.

A single person, previously mentioned, whose gender is unknown, irrelevant, or (since 21st century) non-binary.

People; some people; people in general; someone, excluding the speaker.

The authorities: government, police, employers, etc.

The opponents of the side which is keeping score.

To refer to (someone, sometimes especially someone who does not use gender-neutral pronouns) using they/them pronouns.

alternative form of þei (“they”)

alternative form of þi (“thy”)

alternative form of þe (“thee”)

alternative spelling of þey (“thigh”)

alternative spelling of þey (“though”)

alternative spelling of þey (“two”)

Source: wiktionary.org

See also