1. EO - Noun
2. EO - Adjective
3. EO - Proper noun
EO (not comparable)
Initialism of equal-opportunity.
EO (uncountable)
(uncountable) Abbreviation of ethylene oxide.
EO
Initialism of Education Otherwise, a home education charity in the UK
Eo
A river in northern Spain, whose estuary marks part of the border between Galicia and Asturias