The direction of travel from past to future in time considered as a physical dimension.
More example sentences
- In other words, in the microworld, there is no intrinsic arrow of time, distinguishing the future from the past.
- In the late twentieth century, an arrow of time may have been discovered at the subatomic level.
- There was a conference on Wheeler Feynman electrodynamics and the arrow of time, in 1963.