Ex Definition
To delete; to cross out.
Origin of Ex
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Middle English from Old French from Latin and Greek eghs in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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Imitative of the ending of Latin-derived words such as index and codex
From Wiktionary
ME < OFr or L, akin to Gr ex-, exō-, ek- < IE base *eĝhs, out
From Webster's New World College Dictionary, 5th Edition
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Latin eghs in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
From ex–
From American Heritage Dictionary of the English Language, 5th Edition