1 existing in a person or thing from birth; innate.
2 formed at the same time.
3 allied, congenial.
4 Bot. (of organs) congenitally united so as to form one part.
5 Geol. (of water) trapped in sedimentary rock during its deposition.
Etymology: LL connatus past part. of connasci (as com-, nasci be born)
Useful english dictionary. 2012.