As a Noun: 1. The salty, colourless liquid which comes through your skin when you are hot, ill, or afraid. English = sweat, perspiration. 2. Of the weather or air in a room, the quality of being hot. English = heat. As a Verb or Adjective: 1. To have sweat come through your skin because your are hot, ill, or afraid. English = sweat, perspire. 2. To involve a lot of work and activity, especially if that is likely to make you sweat. English = (be) strenuous. 3. Of the weather, to have a high temperature, especially high enough to make you sweat. English = (be) hot. Interactive: 1. Used alone to express the fact that you are hot or relieved. English = 'Phew!'