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To take responsibility, authority, or control over (someone or something), especially after having not done so initially. The manager had to take charge after the project failed to meet its initial deadline. Mary's going to take charge of the desk for the evening. I was unexpectedly asked to take charge of their children when they passed away.
take charge (of someone or something)
to take (over) control of someone or something. The president came in late and took charge of the meeting. When the new manager took charge, things really began to happen.
Assume control, command, or responsibility, as in I'll take charge of selling the tickets if you'll do the publicity, or They're not happy about the counselor who took charge of the children. [Late 1300s]
take ˈcharge (of something)begin to have control or command: The Chief Inspector took charge of the investigations into the murder.
To assume control or command.