Thesaurus.com
Dictionary.com
Definitions

C.O.

NOUN
conscientious objector
Synonyms


co
NOUN
carbon monoxide
Synonyms


NOUN
commanding officer
Synonyms






Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Instead, it was “so many people screaming, screaming to talk to each other. Screaming for assistance: ‘Yo, C.O., my toilet flooded.

From Slate • May 19, 2025

The C.O. sat glued to this chair, looking bored.

From Salon • Aug. 8, 2020

An older, more-seasoned lifeboat pilot, future station C.O.

From Seattle Times • Aug. 18, 2019

Mr. Ginsberg, the Indiana Jones of apothecary relics, is also the president, owner, and historical expert of C.O.

From New York Times • Feb. 1, 2019

When he looked behind him and saw a wobbling, pixilated mass of men doing their best to imitate a line, he barked, “Follow me, hogs. Follow your C.O. and that is an order.”

From "The Great Santini" by Pat Conroy




Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "C.O." for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com