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Definitions

protocol

[proh-tuh-kawl, -kol, -kohl] / ˈproʊ təˌkɔl, -ˌkɒl, -ˌkoʊl /
NOUN
rules of conduct, behavior in certain situation
Synonyms
STRONGEST
agreement code contract covenant custom obligation pact
STRONG
compact concordat conventions courtesy decorum etiquette formalities manners order politesse propriety treaty
WEAK
good form p's and q's
Antonyms
STRONGEST
disagreement
STRONG
bad manners impoliteness rudeness
WEAK
crudeness impropriety

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.

This time the doors had already been closed and the jet bridge retracted, so the protocol shifted.

From The Wall Street Journal • Apr. 8, 2026

After a second doctor changed their protocol, they had their first child together through IVF.

From The Wall Street Journal • Apr. 7, 2026

A slight, late-morning pullback happened just before media outlets reported on an Islamic Republic News Agency headline that said Iran and Oman were drafting a protocol to monitor traffic through the strait.

From Barron's • Apr. 2, 2026

I’d still favor using industry-standard protocols, like OpenVPN, but given that ExpressVPN has open-sourced the protocol, it makes me less wary about using it.

From Salon • Apr. 1, 2026

“Is that the standard protocol here?” asks the Head Peacekeeper.

From "Catching Fire" by Suzanne Collins