WordWeb Online

1. Characterized by grandeur
   "magnificent cathedrals";
   - brilliant, glorious, splendid, majestic
    
2. Of surpassing excellence
   "a magnificent performance";
   - brilliant, superb
    
3. Surpassingly good
   "a magnificent meal";
   - superb
    
4. Extraordinarily good or great; used especially as an intensifier
   "a magnificent trip to the Orient";
   - fantastic, grand, howling [informal], marvelous [US], marvellous [Brit, Cdn], rattling [informal], terrific, tremendous, wonderful, wondrous, epic [slang], heavenly [informal]

See also: extraordinary, good, impressive, superior

Encyclopedia: Magnificent