noun (n)

• the state of being tangent; having contact at a single point or along a line without crossing(noun.state)

  source: wordnet30
• (electronics) a junction where things (as two electrical conductors) touch or are in physical contact(noun.artifact)

  Synonym:
  contact
  

  source: wordnet30
• The quality or state of being tangent; a contact or touching.(noun)

  source: webster1913