ad. Otherwise; at another time; in other circumstances; otherwise called.ad. Used to connect the different names of a person who has gone by two or more, and whose true name is for any cause doubtful; as, Smith, alias Simpson.n. Another name; an assumed name.n. A second or further writ which is issued after a first writ has expired without effect.n. An abbreviation that replaces a string of in-game commands and thereby reduces typing when performing routine actions or tasks.n. An spurious signal generated as a technological artifact.v. To assign an additional name to an entity, often a more user-friendly one.v. to become indistinguishable