Indeterminacy refers to a state where outcomes or events cannot be precisely predicted or determined. This concept is often discussed in various fields, including quantum mechanics, where particles can exist in multiple states until observed, leading to uncertainty about their exact position or momentum. In philosophy, indeterminacy can relate to the idea that not all events are causally determined, allowing for free will and unpredictability in human actions. This challenges traditional notions of determinism, which suggest that every event is the result of preceding causes, leaving no room for randomness or choice.