n.[U]

1. 相關性；相互依存
2. 相對性
   They teach the relativity of all ethical ideas.

   他們宣揚一切道德觀念的相對性。

3. 【物】相對論
4. 【哲】相對主義；認識的相對性

n.

1. the absence of standards of absolute and universal application.
2. Physics  a description of matter, energy, space, and time according to Einstein's theories based on the importance of relative motion and the principle that the speed of light is constant for all observers.