[ad. F. concerte-r (16th c.), ad. It. concertare to proportion or accord together, to agree or tune together, to sing or play in concert.

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  The Italian is identified by Diez with L. concertāre intr., to contend zealously, dispute, debate. Such a change of sense might conceivably come about through an intermediate ‘argue out, settle by debate,’ whence ‘come to terms, arrange terms’; but evidence is wanting. Florio has, in 16th-c. It., conserto, consertare, as parallel forms of concerto, concertare; these (if real words) point to L. *consertāre freq. of conserĕre ‘to join or fit together, connect’; the same origin has been claimed by Spanish etymologists for Sp. concertar, which has among other senses ‘to mend a thing broken.’ But here the phonetic change is unexplained. Already in 16th-c. It. concerto was associated in the musical sense with concento (CONCENT); Florio, 1598, gives concerto merely with a cross-reference to concento. Hence a conjecture that concerto, concertare were perversions of conserto, consertare, under the influence of concento: but what then of Sp. concertar?

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  In Eng. used by Barret, from It., in 1598; app, not otherwise in use till taken from Fr. nearly a century later.]

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  † 1.  trans. To bring to agreement or unity; to unite. Obs.

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1598.  Barret, Theor. Warres, II. i. 22. When as he cannot concert and agree them [soldiers], he is to referre them ouer vnto his Captaine.

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1696.  Brookhouse, Temple Open., 2. Being now concerted into a New Body.

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  2.  To arrange or contrive (measures, an enterprise, etc.) by mutual agreement.

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1694.  Molesworth, Acc. Denmark (ed. 3), 47. A Design before concerted … between him and the Bishops.

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1710.  Swift, Lett. (1767), III. 35. I have been walking, and … concerting where to see Mr. Harley.

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1725.  De Foe, Voy. Round World (1840), 207. We began to concert measures for his coming on board with secrecy.

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1836.  Thirlwall, Greece, II. 21. The insurrection seems not to have been judiciously concerted.

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  b.  Of a single person: To plan, devise, arrange.

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1712.  Hearne, Collect. (Oxf. Hist. Soc.), III. 498. I must now concert matters about yt Affair.

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1878.  Bosw. Smith, Carthage, 433. He could … concert his measures against any state.

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  c.  intr. To arrange a matter by agreement with some one; to form plans. ? Obs.

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1707.  Freind, Peterborow’s Cond., 174. You may concert in every thing … with Prince Henry.

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1786.  T. Jefferson, Writ. (1859), I. 567. The gentlemen with whom we had before concerted.

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1791.  Boswell, Johnson, 2 June, an. 1781. I therefore concerted with Mr. Dilly, that I should steal away.

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1796.  Nelson, 10 July, in Nicolas, Disp. (1845), II. 208. We concerted on the most proper methods for speedily executing the Vice-Roy’s instructions.

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  3.  intr. To sing or play in concert. rare.

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1827.  Pollok, Course T., VII. The thrush Concerting with the lark that hymned on high.

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1879.  [see CONCERTING].

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  4.  Mus. (trans.) To arrange in parts. (nonce-use from CONCERTED 2, q.v.)

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1884.  G. Moore, Mummer’s Wife (1887), 160. [I do not know] whether I ought to concert that first number … or have it sung in unison.

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  † II.  5. [L. concertāre.] To dispute (a statement, etc.). Obs. rare.

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1689.  Apol. Failures Walker’s Acc., 11. Though Mr. Walker might modestly concert the Truth of those Passages … yet right he at no hand dispute inserting ’em.

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