What is the meaning of Os?

(n.) A mouth; an opening; an entrance.
(n.) One of the ridges of sand or gravel found in Sweden, etc., supposed by some to be of marine origin, but probably formed by subglacial waters. The osar are similar to the kames of Scotland and the eschars of Ireland. See Eschar.
(n.) A bone.

Webster's Revised Unabridged Dictionary

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APA	Webster's. (2011). os. Retrieved September 21, 2026, from http://smartdefine.org/os/definitions/2039645
Chicago	Webster's. 2011. "os" http://smartdefine.org/os/definitions/2039645 (accessed September 21, 2026).
Harvard	Webster's 2011, os, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/os/definitions/2039645>.
MLA	Webster's. "os" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/os/definitions/2039645>

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Alternative definitions by

WordNet Webster's Carl Meissner Military Dictionary (DoD)Joan Ellis