Sign of the Future is a term used to describe an indication of what is to come in the future. An OMEN, PORTENT, and PRESAGE are all words that can be used to describe this concept. An OMEN is a sign or warning of something to come, usually of a negative nature. A PORTENT is a sign or warning of something important or momentous that is about to happen. Lastly, a PRESAGE is a sign or warning of something that is about to happen, usually of a positive nature. All three words can be used to describe a Sign of the Future.