adj. 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.
[ LL connatus past part. of connasci (as com-, nasci be born) ]