WordWeb Online

1. Of behaviour that is impressive and ambitious in scale or scope
   "an expansive lifestyle";
   - grand, heroic
    
2. (psychiatry) marked by exaggerated feelings of euphoria and delusions of grandeur
    
3. Friendly and open and willing to talk
   "wine made the guest expansive";
   - talkative
    
4. Able or tending to expand or characterized by expansion
   "Expansive materials"; "the expansive force of fire"

See also: blow-up, cavernous, communicative, communicatory, distensible, erectile, euphoric, expandable, expandible, expansible, impressive, inflatable

Antonym: unexpansive

Encyclopedia: Expansive