As a Noun: 1. The action of behaving in a way that is intended to make people believe that something is the case, although in fact it is not. English = pretence. 2. Something that is made to look like something real. English = imitation, copy. 3. An object, especially a work of art, which is made to appear real but which is not. English = fake. As a Verb or Adjective: 1. To act in a way that is intended to make people believe that something is the case, although in fact it is not. English = pretend. Idiomatic English = make believe, put on an act. 2. To be made to look like something real; to be not natural and exist or happen only because people have created it. English = (be) artificial, (be) false, (be) fake. 3. Of a statement, idea or action, to not be true or to be based on wrong information. English = (be) false. Interactive: 1. Used alone to mean that you will accept something as true or real, or try to do something that you doubt will work, only provisionally, as a kind of working hypothesis, in order to see what happens. 2. English = 'Okay, let's give it a go, then!', 'Let's see what happens then!', 'I'll try, but I don't think it will work!', 'Okay, let's assume it's the case', and so on. As Modifier: 1. Used at the beginning of a sign sentence to mean that the action in that sentence is not real or actual, but you are going to pretend it is and see what that means. You know a past action did not happen, a current action is not happening, 2. or a future action has not happened yet, but you talk about it anyway. English = if. 3. 2. Used to introduce a possible situation or action. English = suppose, what if.