As nouns the difference between relativity and relevancy
is that relativity
is the state of being relative to something else while relevancy
is (legal|scotland) sufficieny (of a statement, claim etc) to carry weight in law; legal pertinence.
The state of being relative to something else.
(physics) The principle that the laws of physics should be the same for all observers.
(relativity) Either of two theories (special relativity or general relativity) developed by German-American physicist . Also called Einsteinian relativity .
(legal, Scotland) Sufficieny (of a statement, claim etc.) to carry weight in law; legal pertinence.
(uncountable) The degree to which a thing is relevant; relevance, applicability.
*1842 , (Edgar Allan Poe), ‘The Myster of Marie Rogêt’:
*:It is the malpractice of the courts to confine evidence and discussion to the bounds of apparent relevancy .
(countable) A relevant thing.
* In contemporary usage (relevance) is about 20 times more common in the US (COCA) and about 50 times more common in the UK (BNC) than this term.