If something such as a machine or vehicle shudders, it shakes suddenly and violently. The train began to pull out of the station -- then suddenly shuddered to a halt The whole ship shuddered and trembled at the sudden strain
If something sends a shudder or shudders through a group of people, it makes them worried or afraid. The next crisis sent a shudder of fear through the UN community
feelings If you say that you shudder to think what would happen in a particular situation, you mean that you expect it to be so bad that you do not really want to think about it. I shudder to think what would have happened if he hadn't acted as quickly as he did. a shaking movement
If you shudder, you shake with fear, horror, or disgust, or because you are cold. Lloyd had urged her to eat caviar. She had shuddered at the thought Shudder is also a noun. She recoiled with a shudder