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1、Signal,V.1.to make a movement or sound to give sb.a message,an order etc.发信号，发暗号，示意He signaled to the waiter for the bill.She signaled that it was time to leave.2.to be a sign that something exists or is likely to happen.标志，表明，预示This announcement signaled a clear change of policy.3.to do something t
2、o make your feelings or opinions known.表达，表示，显示He signaled his discontent by refusing to vote.,n.,1.a movement or sound that you make to give sb.Information,instructions a warning,etc.信号，暗号The siren was a signal for everyone to leave the building.2.an event,an action,a fact,etc.that shows something
3、exists or is likely to happen.标志，预示，信号The rise in inflation is a clear signal that the governments policies are not working.3.a piece of equipment that uses different colored lights to tell drivers to go slower,stop,etc.esp.on railways and road.指示灯，信号灯，红绿灯Traffic signals4.a series of electrical waves that carry sounds,pictures or messages,for example to a radio or television.传输声音，图像或其他信息的电波信号TV signals,adj.,(only before n.)important重大的，显要的A signal honor极大的荣誉,
