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EO

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executive order.

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Definition for EO (2 of 3)

eo-

a combining form meaning “early,” “primeval,” used in the formation of compound words: Eocene; eohippus.

Origin of eo-

<Greek, combining form of ēṓs (Attic héōs) dawn; akin to east, Aurora

Definition for EO (3 of 3)

e.o.

abbreviation

ex officio.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for EO

British Dictionary definitions for EO (1 of 2)

eo-

combining form

early or primevalEocene; eohippus

Word Origin for eo-

from Greek, from ēōs dawn

British Dictionary definitions for EO (2 of 2)

e.o.

abbreviation for

ex officio
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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