/ˈproʊtəkɔːl/

proto·col AW

BrE /ˈprəʊtəkɒl/

NAmE /ˈproʊtəkɔːl/,

/ˈproʊtəkɑːl/

[U]

a system of fixed rules and formal behaviour used at official meetings, usually between governments

a breach of protocol

the protocol of diplomatic visits

[C] (specialist)

the first or original version of an agreement, especially a treaty between countries, etc.; an extra part added to an agreement or treaty

the first Geneva Protocol

It is set out in a legally binding protocol which forms part of the treaty.

[C] (computing)

a set of rules that control the way data is sent between computers

[C] (specialist)

a plan for performing a scientific experiment or medical treatment