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ex officio

[eks uh-fish-ee-oh] /ˈɛks əˈfɪʃ iˌoʊ/
noun
1.
by virtue of office or official position.
Origin
1525-1535
1525-35; < Latin
Related forms
ex-officio, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for more ex-officio

ex officio

/ˈɛks əˈfɪʃɪəʊ; əˈfɪsɪəʊ/
adverb, adjective
1.
by right of position or office ex off
Word Origin
Latin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for more ex-officio

ex officio

Latin, "in discharge of one's duties," literally "out of duty," from ex "out of" (see ex-) + officio, ablative of officium "duty" (see office).

Online Etymology Dictionary, © 2010 Douglas Harper
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