Wordnet 3.0
NOUN (2)
1. 
 the state of being tangent; 
 having contact at a single point or along a line without crossing; 
2. 
 (electronics) a junction where things (as two electrical conductors) touch or are in physical contact; 
- Example: "they forget to solder the contacts"[syn: contact, tangency]
The Collaborative International Dictionary of English v.0.48:
Tangency \Tan"gen*cy\, n.
   The quality or state of being tangent; a contact or touching.
   [1913 Webster]
WordNet (r) 3.0 (2006):
tangency
    n 1: the state of being tangent; having contact at a single
         point or along a line without crossing
    2: (electronics) a junction where things (as two electrical
       conductors) touch or are in physical contact; "they forget to
       solder the contacts" [syn: contact, tangency]