Old theory Synonyms

Definitions for Old


  • (adjective) being of advanced years and especially past middle age
  • (adjective) dating or surviving from the distant past
  • (adjective) having been such at some previous time

Definitions for Theory


  • (noun) an idea that is the starting point for making a case or conducting an investigation
  • (noun) a belief that can guide behavior
  • (noun) a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena