arrow of time

Noun

Meaning

(physics) The direction of time within a four-dimensional relativistic view of the cosmos.

(philosophy) The subjective feeling of movement from past to future.

Entropy.

Examples

The mystery of the arrow of time comes down to this: Why were the conditions in the early universe set up in a particular way, in a configuration of low entropy that enabled all of the interesting and irreversible processes to come? Sean M. Carroll

The arrow of time doesn't move forward forever. There's a phase in the history of the universe where you go from low entropy to high entropy. But then, once you reach the locally maximum entropy you can get to, there's no more arrow of time. Sean M. Carroll

Arrow of time main Time appears to have a direction—the past lies behind, fixed and immutable, while the future lies ahead and is not necessarily fixed. Source: Internet

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