As a Verb or Adjective: 1. A situation or experience which is very serious and unpleasant. English = (be) terrible. 2. To cause you to feel great shock, fear, and disgust. English = (be) horrible, (be) shocking, (be) dreadful, (be) appalling. Interactive: 1. Used alone to show that you feel very unpleasant, shocked, frightened, or disgusted. English = 'Terrible!', 'How awful!', 'Shocking!', 'Appalling!'