indirect vs signified

indirect

verb
  • To access by means of indirection; to dereference. 

adj
  • Not of obvious or immediate cause, but as a secondary result 

  • Not focused straight at the target or subject, but by more subtle means 

  • Not involving the quickest, shortest, or most convenient path 

noun
  • An indirect cost. 

  • An indirect radiator 

signified

noun
  • The concept or idea evoked by a sign. 

How often have the words indirect and signified occurred in a corpus of books? (source: Google Ngram Viewer )