American Heritage Dictionary
(10)
Century Dictionary
(9)
GNU Webster's 1913
(3)
WordNet
(6)
Elsewhere on the web
You should care about your posture -- this is not right.— Yossi Vardi fights local warming
Stand in the correct posture, that is, with your toes pointed out in front of you, your knees relaxed and your feet at hip distance.— MyLinkVault Newest Links
I can no longer blame being addicted to the Internet for my posture issues.— Beyond the Rhetoric

American Heritage Dictionary (1)
Century Dictionary (2)
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You can expect to see this word about twice a week.