英汉词典

1. 挥(手)示意(或致意)
    If you wave or wave your hand, you move your hand from side to side in the air, usually in order to say hello or goodbye to someone.

    e.g. Jessica caught sight of Lois and waved to her...
           杰茜卡看到了洛伊丝，就冲她挥手致意。
    e.g. He waved at the waiter, who rushed to the table...
           他冲服务员招了招手，服务员就急忙跑到桌边。

2. 挥手示意(方向);挥手指引
    If you wave someone away or wave them on, you make a movement with your hand to indicate that they should move in a particular direction.

    e.g. Leshka waved him away with a show of irritation...
           廖什克恼火地挥手让他离开。
    e.g. He waited for a policeman to stop the traffic and wave the people on...
           他等着警察来让车辆停下，指挥人们前行。

3. 挥舞
    If you wave something, you hold it up and move it rapidly from side to side.

    e.g. Hospital staff were outside to welcome him, waving flags and applauding...
           医院的工作人员都在外面一边挥动旗子一边鼓掌欢迎他。
    e.g. She was apt to raise her voice and wave her hands about.
           她经常会提高嗓门，双手胡乱挥舞。