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