Alias n. 1 An assumed or additional name used by a person, frequently to conceal her true identity, or such a name applied to a person by others. 2 An alias writ.

Alibi n. 1 In a criminal action, a defense that the defendant was somewhere other than the scene of the crime when the crime was committed. 2 The fact or state of being somewhere other than the scene of the crime when the crime was committed.

Alien n. 1 One who is not a citizen, national, or subject of a particular country. 2 One who is not a citizen, national, or subject of the country in which he resides. 3 One who is born in or owes his allegiance to a foreign country.

Deportable alien. An alien who may be deported because she was an inadmissible alien when she entered the United States or violated the regulations (for example, by committing a serious crime) governing the conduct of aliens who are within the country).

Illegal alien. 1 An alien who enters or remains in the United States without legal authorization or by fraud. 2 An alien who marries an American citizen, but with no intention of living with his or her spouse as husband and wife, for the purpose of improperly entering the Unites States or avoiding deportation.