plural of concertion

Act of concerting; adjustment.

To plan together; to settle or adjust by conference, agreement, or consultation. / To plan; to devise; to arrange. / To act in harmony or conjunction; to form combined plans.

(uncountable) Agreement in a design or plan; union formed by mutual communication of opinions and views; accordance in a scheme; harmony; simultaneous action.

simple past tense and past participle of concert

Performed through a concert of effort; done by agreement or in combination. / (music) Having separate parts for voices and instruments.

Third-person singular simple present indicative form of concert

present participle of concert

Concerted activity; something done together by two or more people.

(US) To perform in concerts / To adapt to the concert form