alias

noun
UK /ˈeɪliəs/
US /ˈeɪliəs/

A name someone uses instead of their real name.

The spy used an alias so nobody knew who he really was.


OTHER MEANINGS

2. A false name used by a criminal to hide who they are.

The thief was caught traveling under an alias.

3. A second name a person is also known by.

The author wrote under an alias for many years.

4. A short name used in a computer program to stand for something else.

The programmer created an alias for the long file path.