Concert

1. A musical entertainment in which several voices or instruments take part.
2. To plan; to devise; to arrange.
3. Musical accordance or harmony; concord.
4. To plan together; to settle or adjust by conference, agreement, or consultation.
5. To act in harmony or conjunction; to form combined plans.
6. Agreement in a design or plan; union formed by mutual communication of opinions and views; accordance in a scheme; harmony; simultaneous action.