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protocol [ pro·to·col ]

[
US
ˈprəʊtəkɑːl ]
[
UK
ˈprəʊtəkɒl ]
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Noun

1. The official procedure or system of rules governing affairs of state or diplomatic occasions.

He was a career diplomat who put protocol above all else.

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2. The accepted or established code of procedure or behaviour in any group, organization, or situation.

He said he obviously went against established protocol.

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3. The original draft of a diplomatic document, especially of the terms of a treaty agreed to in conference and signed by the parties.

As with private contracts, so with international treaties and protocols.

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4. An amendment or addition to a treaty or convention.

This is arranged for in two protocols to the Treaty.

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5. A formal or official record of scientific experimental observations.

Theories, case studies, empirical studies, therapy session transcripts and treatment protocols are generously offered throughout this work.

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6. A procedure for carrying out a scientific experiment or a course of medical treatment.

the low doses of morphine recommended in the protocol

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7. A set of rules governing the exchange or transmission of data between devices.

The team built the platform on Internet communication protocols.

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Origin

1. Late Middle English (denoting the original minute of an agreement, forming the legal authority for future dealings relating to it): from Old French prothocole, via medieval Latin from Greek prōtokollon ‘first page, flyleaf’, from prōtos ‘first’ + kolla ‘glue’. Sense 1 derives from French protocole, the collection of set forms of etiquette to be observed by the French head of state, and the name of the government department responsible for this (in the 19th century).

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