Pre indications refer to signs or signals that may indicate the future occurrence of something. Some synonyms for pre indications are precursors, warnings, early signs, harbingers, indications, omens, signals, and portents. Precursors are events or situations that precede something and serve as an indication of what will follow. Warnings are alerts given to caution someone against something potentially harmful. Early signs refer to the initial manifestations of something. Harbingers are indicators that something significant is about to happen. Indications are clues or pieces of information that suggest something. Omens are believed to predict events or outcomes. Signals can be physical gestures or indications of events. Portents are signs believed to foreshadow a future event, usually negative.