Definitions for janusˈdʒeɪ nəs
Random House Webster's College Dictionary
a Roman god of doorways and beginnings, usu. represented as having a head with two faces looking in opposite directions.
Origin of Janus:
< L, special use of jānus doorway, archway, arcade
(Roman mythology) the Roman god of doorways and passages; is depicted with two faces on opposite sides of his head
The god of gates and doorways; having two faces looking in opposite directions.
A moon of Saturn.
Origin: From Ianus.
a Latin deity represented with two faces looking in opposite directions. Numa is said to have dedicated to Janus the covered passage at Rome, near the Forum, which is usually called the Temple of Janus. This passage was open in war and closed in peace