Etymology
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anterior (adj.)

"more in front; earlier," 1610s, Latin, literally "former," comparative of ante "before" (from PIE root *ant- "front, forehead," with derivatives meaning "in front of, before"). Related: Anteriorly (1590s); anteriority.

updated on June 10, 2017

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Definitions of anterior from WordNet
1
anterior (adj.)
earlier in time;
Synonyms: prior
anterior (adj.)
of or near the head end or toward the front plane of a body;
2
anterior (n.)
a tooth situated at the front of the mouth;
his malocclusion was caused by malposed anteriors
Synonyms: front tooth
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.