/i merr"zheuhn, -sheuhn/ , n.
1. Also called egress . Astron. the emergence of a heavenly body from an eclipse, an occultation, or a transit. Cf. immersion (def. 5).
2. Archaic. the act of emerging.
[ 1625-35; emers ( us ) (ptp. of emergere to EMERGE) + -ION ]