From The Collaborative International Dictionary of English v.0.48 [gcide]:
Posterior \Pos*te"ri*or\ (p[o^]s*t[=e]"r[i^]*[~e]r), a. [L.
posterior, compar. of posterus coming after, from post after.
See {Post-}.]
1. Later in time; hence, later in the order of proceeding or
moving; coming after; -- opposed to {prior}.
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Hesiod was posterior to Homer. --Broome.
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2. Situated behind; hinder; -- opposed to {anterior}.
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3. (Anat.) At or toward the caudal extremity; caudal; -- in
human anatomy often used for {dorsal}.
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4. (Bot.) On the side next the axis of inflorescence; -- said
of an axillary flower. --Gray.
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From WordNet (r) 3.0 (2006) [wn]:
posterior
adj 1: located at or near or behind a part or near the end of a
structure [ant: {anterior}]
2: coming at a subsequent time or stage; "without ulterior
argument"; "the mood posterior to" [syn: {later(a)},
{ulterior}, {posterior}]
n 1: the fleshy part of the human body that you sit on; "he
deserves a good kick in the butt"; "are you going to sit on
your fanny and do nothing?" [syn: {buttocks}, {nates},
{arse}, {butt}, {backside}, {bum}, {buns}, {can},
{fundament}, {hindquarters}, {hind end}, {keister},
{posterior}, {prat}, {rear}, {rear end}, {rump}, {stern},
{seat}, {tail}, {tail end}, {tooshie}, {tush}, {bottom},
{behind}, {derriere}, {fanny}, {ass}]
2: a tooth situated at the back of the mouth [syn: {back tooth},
{posterior}]
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