Word Study
post-
CIDE DICTIONARY
post-, [L. post behind, after; cf. Skr. paçcābehind, afterwards.].
A prefix signifying behind, back, after; as, postcommissure, postdot, postscript. [1913 Webster]
OXFORD DICTIONARY
post-, prefix after in time or order.
Etymology
from or after L post (adv. & prep.)
For further exploring for "post-" in Webster Dictionary Online
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