Emily Dickinson Lexicon

CON-CERT', v.t. [It. concertare, to contrive; Sp. concertar, to agree, to adjust, to covenant; Port. id.; Fr. concerter; from L. concerto, to strive together; con and certo, to strive. The primary sense is to set or act together.]

To contrive and settle by mutual communication of opinions or propositions; to settle or adjust, as a plan or system to be pursued, by conference or agreement of two or more parties; as, to concert measures; to concert a plan of operations.