ingress
noun
[ ˈɪnɡrɛs ]
• the action or fact of going in or entering; the capacity or right of entrance.
Similar:
entry,
entrance,
access,
means of entry,
admittance,
admission,
way in,
approach,
means of approach,
right of entry,
• the arrival of the sun, moon, or a planet in a specified constellation or part of the sky.
Origin:
late Middle English (in the sense ‘an entrance or beginning’): from Latin ingressus, from the verb ingredi ‘enter’.