ingress

1. (astronomy) the disappearance of a celestial body prior to an eclipse (synset 107336941)
   referred to in: astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
   is a type of: disappearance - the event of passing out of sight
   is a part of: eclipse, occultation - one celestial body obscures another
   same as: immersion
2. The act of entering (synset 100049744)
   "she made a grand entrance"
   is a type of: arrival - the act of arriving at a certain place
   subtypes:

   • incursion - the act of entering some territory or domain (often in large numbers)
   • intrusion - entrance by force or without permission or welcome
   • irruption - a sudden violent entrance; a bursting in
   • entree - an entrance, especially a theatrical entrance onto a stage or as if onto a stage
   • enrollment, enrolment, registration - the act of enrolling
   • penetration - the act of entering into or through something
   • admission, admittance - the act of admitting someone to enter
   same as: entering, entrance, entry, incoming

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