Available Definitions:
1) n. - The act of entering; entrance; as, the ingress of air into the lungs.
2) n. - Power or liberty of entrance or access; means of entering; as, all ingress was prohibited.
3) n. - The entrance of the moon into the shadow of the earth in eclipses, the sun's entrance into a sign, etc.
4) v. i. - To go in; to enter.