Meaning of “protocol” in the English Dictionary

"protocol" in English

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uk /ˈprəʊ.tə.kɒl/ us /ˈproʊ.t̬ə.kɑːl/

(Definition of “protocol” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"protocol" in American English

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us /ˈproʊt̬·əˌkɔl, -ˌkɑl/

protocol noun (RULES)

[ C/U ] the formal system of rules for correct behavior on official occasions:

[ U ] According to protocol, the new ambassador will present his credentials to the president.

science [ C/U ] A protocol is also the rules to be followed when doing a scientific study or an exact method for giving medical treatment:

[ U ] medical protocol
[ C ] a treatment protocol

protocol noun (AGREEMENT)

(Definition of “protocol” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"protocol" in Business English

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uk /ˈprəʊtəkɒl/ us

[ C ] POLITICS a formal international agreement between governments relating to a particular activity:

Trade relations between the European Union's recent members are governed by a strict protocol.
the Kyoto protocol

[ C ] IT a set of technical rules that control the exchange of information between different computers or computer networks:

Companies that use a competitor's protocols in their products will pay 0.4% of their revenue to that company.
Each computer's Web connection has a unique internet protocol address.

[ C or U ] the system of rules and acceptable behaviour that people or organizations should follow in official situations, for example when they have formal discussions:

After last week's incident, officials in charge of airport security have been ordered to review safety regulations and protocol.
For a junior officer to communicate such important information directly to a senior officer in this way is considered a breach of protocol.
protocol for sth What is the protocol for handling complaints?

(Definition of “protocol” from the Cambridge Business English Dictionary © Cambridge University Press)