Note: in AM, also use 'reentry'
1.
Re-entry is the act of returning to a place, organization, or area of activity that you have left.
The house has been barred and bolted to prevent re-entry...
N-UNCOUNT : also a N
2.
Re-entry is used to refer to the moment when a spacecraft comes back into the earth’s atmosphere after being in space.
The station would burn up on re-entry into the earth’s atmosphere.
N-UNCOUNT : also a N