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.

Pennington's hometown was Glendale, Kentucky, and he was assigned to the 1st Space Battalion, 1st Space Brigade out of Fort Carson, CO.

From Barron's • Mar. 10, 2026

“What Eric voted for was a resolution to condemn a horrific antisemitic attack in Boulder, CO that killed Karen Diamond, an 82-year old grandmother,” a campaign spokesman said in a statement.

From Los Angeles Times • Jan. 28, 2026

“When you get a chance can you give me an update on the status of the 10 CO conspirators?” the email reads.

From Salon • Dec. 24, 2025

"They sat in a building inhaling fatal levels of carbon monoxide which we have been told but for 'sheer luck' there was no fatalities due to the high level of CO detected," she said.

From BBC • Nov. 20, 2025

Back at the Academy, more than one instructor had said it took four or five years to make a good CO.

From "Newjack: Guarding Sing Sing" by Ted Conover




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