Wordnet 3.0
VERB (1)
1. 
 come near or verge on, resemble, come nearer in quality, or character; 
- Example: "This borders on discrimination!"- Example: "His playing approaches that of Horowitz"[syn: border on, approach]
WordNet (r) 3.0 (2006):
border on
    v 1: come near or verge on, resemble, come nearer in quality, or
         character; "This borders on discrimination!"; "His playing
         approaches that of Horowitz" [syn: border on, approach]