| REL | a pronoun (as `that' or `which' or `who') that introduces a relative clause referring to some antecedent |
|---|---|
| REL | a quantity relative to some purpose |
| REL | a relative by marriage |
| REL | in a relative manner |
| REL | consider or treat as relative |
| REL | the philosophical doctrine that all criteria of judgment are relative to the individuals and situations involved |
| REL | (physics) relating or subject to the special or the general theory of relativity |
| REL | of or relating to the philosophical doctrine of relativism |
| REL | (physics) the mass of a body in motion relative to the observer: it is equal to the rest mass multiplied by a factor that is greater than 1 and that increases as the magnitude of the velocity increases |
| REL | by the theory of relativity |
| REL | (physics) the theory that space and time are relative concepts rather than absolute concepts |
| REL | (physics) the theory that space and time are relative concepts rather than absolute concepts |