Time reversal may refer to:
- Reverse motion â a visual effect in which reversing the order of the frames of a film or video makes time appear to run backward
- Reverse tape effects â an audio effect in which reversing the direction of an audio recording renders sounds backward
- T-symmetry (or time reversal symmetry) â the expected symmetry of physical laws independent of whether time runs forward or backward
- Time reversibility â the ability of some processes to operate in either direction of time
- Time reversal signal processing â a technique for focusing acoustic and electromagnetic waves by reversing in time a system's response signals
- Time travel â theorised and speculative concepts about traveling into the past or the future