Meaning of POST- in English
a prefix, meaning "behind," "after," "later," "subsequent to," "posterior to," occurring originally in loanwords from Latin ( postscript ), but now used freely in the formation of compound words ( post-Elizabethan; postfix; postgraduate; postorbital ).
[ post (adv. and prep.) ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012