The Collaborative International Dictionary
Synastry
Synastry \Syn"as*try\, n. [Pref. syn- + Gr. ? a star.]
Concurrence of starry position or influence; hence,
similarity of condition, fortune, etc., as prefigured by
astrological calculation. [R.]
--Motley.
Wiktionary
synastry
n. 1 (context astrology English) concurrence of the position or influence of stars 2 (context by extension English) similarity of condition, fortune, etc., as prefigured by astrological calculation