WordWeb Online

1. Given to expressing yourself freely or insistently
   "outspoken in their opposition to segregation";
   - vocal
    
2. Characterized by directness in manner or speech; without subtlety or evasion
   "it is possible to be outspoken without being rude";
   - blunt, candid, forthright, frank, free-spoken, plainspoken, point-blank, straight-from-the-shoulder

See also: communicative, communicatory, direct