I. ˈālēəs, -lyəs adverb
Etymology: Latin, otherwise, at another time, from alius other — more at else
1. : otherwise called : otherwise known as — used especially in legal proceedings to connect the different names of anyone who has gone by or been known by two or more names
Smith, alias Simpson
2. : at another time
II. noun
( -es )
1. : another name : an assumed name
masquerading under an indeterminate number of aliases — A.E.Wier
2. : alias writ