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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Borrowed from Middle French protocolle, protocole (“document, record”), from Late Latin protocollum (“the first sheet of a volume (on which contents and errata were written)”), from Byzantine Greek πρωτόκολλον (prōtókollon, “first sheet glued onto a manuscript”), from πρῶτος (prôtos, “first”) + κόλλα (kólla, “glue”).
communications protocol
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Classic usage
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