1. (

• concert

) contrive (a plan) by mutual agreement ;

2. (

• concert

) settle by agreement; "concert one's differences" ;

1. (

• concerted ,
• conjunct ,
• conjunctive ,
• cooperative

) involving the joint activity of two or more; "concerted action"; "the conjunct influence of fire and strong wind"; "the conjunctive focus of political opposition"; "a cooperative effort"; "a united effort"; "joint military activities" ;