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Wordnet 3.0

NOUN (3)

1. (computer science) rules determining the format and transmission of data;
[syn: protocol, communications protocol]

2. forms of ceremony and etiquette observed by diplomats and heads of state;

3. code of correct conduct;
- Example: "safety protocols"
- Example: "academic protocol"


The Collaborative International Dictionary of English v.0.48:

Protocol \Pro"to*col\, v. i. To make or write protocols, or first draughts; to issue protocols. --Carlyle. [1913 Webster]
The Collaborative International Dictionary of English v.0.48:

Protocol \Pro"to*col\, n. [F. protocole, LL. protocollum, fr. Gr. ? the first leaf glued to the rolls of papyrus and the notarial documents, on which the date was written; prw^tos the first (see Proto-) + ? glue.] 1. The original copy of any writing, as of a deed, treaty, dispatch, or other instrument. --Burrill. [1913 Webster] 2. The minutes, or rough draught, of an instrument or transaction. [1913 Webster] 3. (Diplomacy) (a) A preliminary document upon the basis of which negotiations are carried on. (b) A convention not formally ratified. (c) An agreement of diplomatists indicating the results reached by them at a particular stage of a negotiation. [1913 Webster]
The Collaborative International Dictionary of English v.0.48:

Protocol \Pro"to*col\, v. t. To make a protocol of. [1913 Webster]
WordNet (r) 3.0 (2006):

protocol n 1: (computer science) rules determining the format and transmission of data [syn: protocol, communications protocol] 2: forms of ceremony and etiquette observed by diplomats and heads of state 3: code of correct conduct; "safety protocols"; "academic protocol"
Moby Thesaurus II by Grady Ward, 1.0:

97 Moby Thesaurus words for "protocol": accord, agenda, agreement, amenities, arrangement, authority, bargain, batting order, bill, bill of fare, binding agreement, blueprint, bond, budget, calendar, card, carte du jour, cartel, civilities, civility, collective agreement, comity, compact, concordat, consortium, contract, convention, conventions, courtliness, covenant, covenant of salt, customs, deal, decencies, decorum, dicker, diplomacy, diplomatic code, docket, draft, elegance, elegancies, employment contract, etiquette, exquisite manners, form, formal agreement, formalities, formality, good form, good manners, ironclad agreement, legal agreement, legal contract, lineup, list of agenda, manners, memorandum, menu, minute, mores, mutual agreement, natural politeness, note, outline, pact, paction, playbill, point of etiquette, politeness, politesse, practice, program, program of operation, programma, promise, proprieties, prospectus, punctilio, quiet good manners, roster, rules of conduct, schedule, slate, social code, social conduct, social graces, social procedures, social usage, stipulation, transaction, treaty, understanding, union contract, usage, valid contract, wage contract
The Jargon File (version 4.4.7, 29 Dec 2003):

protocol n. As used by hackers, this never refers to niceties about the proper form for addressing letters to the Papal Nuncio or the order in which one should use the forks in a Russian-style place setting; hackers don't care about such things. It is used instead to describe any set of rules that allow different machines or pieces of software to coordinate with each other without ambiguity. So, for example, it does include niceties about the proper form for addressing packets on a network or the order in which one should use the forks in the Dining Philosophers Problem. It implies that there is some common message format and an accepted set of primitives or commands that all parties involved understand, and that transactions among them follow predictable logical sequences. See also handshaking, do protocol.
The Free On-line Dictionary of Computing (18 March 2015):

protocol A set of formal rules describing how to transmit data, especially across a network. Low level protocols define the electrical and physical standards to be observed, bit- and byte-ordering and the transmission and error detection and correction of the bit stream. High level protocols deal with the data formatting, including the syntax of messages, the terminal to computer dialogue, character sets, sequencing of messages etc. Many protocols are defined by RFCs or by OSI. See also handshaking. [Jargon File] (1995-01-12)
Bouvier's Law Dictionary, Revised 6th Ed (1856):

PROTOCOL, civil law, international law. A record or register. Among the Romans, protocollunt was a writing at the head of the first page of the paper used by the notaries or tabellions. Nov. 44. 2. In France the minutes of notarial acts were formerly transcribed on registers, which were called protocols. Toull. Dr. Civ. Fr. liv. 3, t. 3, c. 6, s. 1, n. 413. 3. By the German law it signifies the minutes of any transaction. Eneye. Amer. Protocol. In the latter sense the word has of late been received into international law. Ibid.