[1] : WordNet (r) 2.0

background knowledge
     n : information that is essential to understanding a situation
         or problem; "the embassy filled him in on the background
         of the incident" syn: background
see also:
background 

Background >> B Words
Background, definition of term: Background
background_pag1.html

Knowledge >> K Words
Knowledge, definition of term: Knowledge
knowledge_pag1.html

Knowledge Repre >> K Words
Knowledge Repre, definition of term: Knowledge Repre
knowledge+repre_pag1.html

Knowledge Base >> K Words
Knowledge Base, definition of term: Knowledge Base
knowledge+base_pag1.html

Background Radi >> B Words
Background Radi, definition of term: Background Radi
background+radi_pag1.html