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Longman Dictionary of Contemporary English
ante-
prefix
EXAMPLES FROM OTHER ENTRIES
▪ the antebellum South
▪ to antedate
The Collaborative International Dictionary
Ante-

Ante- \An"te-\ ([a^]n"t[-e]-). A Latin preposition and prefix; akin to Gr. 'anti`, Skr. anti, Goth. and-, anda- (only in comp.), AS. and-, ond-, (only in comp.: cf. Answer, Along), G. ant-, ent- (in comp.). The Latin ante is generally used in the sense of before, in regard to position, order, or time, and the Gr. 'anti` in that of opposite, or in the place of.

Douglas Harper's Etymology Dictionary
ante-

word-forming element meaning "before, in front of; previous, existing beforehand; introductory to," from Latin ante (prep. and adv.) "before, in front of, opposite," used in combinations, from PIE *anti "facing opposite, near, in front of, before" (see ante).

Wiktionary
ante-

pre. 1 (context non-productive English) Prior to in time. 2 (context non-productive English) In front of in space.