arrow of time

English

Alternative forms

• time's arrow

Etymology

Reported coined in 1927. (Can this⁽⁺⁾ etymology be sourced?)

Noun

arrow of time (plural arrows of time)

1. (physics) The direction of time within a four-dimensional relativistic view of the cosmos.
2. (philosophy) The subjective feeling of movement from past to future.
3. Entropy.

Translations

direction of time in 4D

• Finnish: ajan nuoli
• Polish: strzałka czasu f
• Portuguese: seta do tempo f
• Romanian: săgeata timpului