Date: 1400-1500
Language: Old French
Origin: prothocole, from Late Greek protokollon 'first page of a document', from kolla 'glue'


1 [uncountable] a system of rules about the correct way to behave on an official occasion:
2 [countable] formal
a) an international agreement between two or more countries:
the Montreal protocol on the protection of the ozone layer
b) a written record of a formal or international agreement, or an early form of an agreement
3TD [countable] technicalTD an established method for connecting computers so that they can exchange information
4 [countable] technical a set of rules that are followed when doing a scientific experiment or giving someone medical treatment

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