raise one's hand

verb5

1. •
   To use the gesture (either literally or figuratively) in order.
2. •
   To volunteer.

   • The sergeant asked for someone to cross the minefield, and Private Muggins raised his hand.
3. •
   To vote; to indicate agreement or approval.

   • "Who wants more money?" asked the trade union boss. All the men raised their hands.
4. •
   To ask a question or make a request.

   • The President said that he would now take questions, and several reporters raised their hands.
   • Little Timmy raised his hand to go to the toilet.
5. •
   To assault physically, notionally with the hand or fist.

   • A man should not raise his hand against his wife.