WordWeb Online

1. Encouraging, approving or pleasing
   "a favorable reply"; "he received a favorable rating"; "listened with a favorable ear"; "made a favorable impression";
   - favourable [Brit, Cdn]
    
2. (of winds or weather) tending to promote or facilitate
   "the days were fair and the winds were favorable";
   - favourable [Brit, Cdn]
    
3. Giving an advantage
   - advantageous, favourable [Brit, Cdn]
    
4. Presaging or likely to bring good luck or a good outcome
   "a favorable time to ask for a raise";
   - golden, favourable [Brit, Cdn], lucky, prosperous

See also: affirmative, affirmatory, approbative, approbatory, approving, beneficial, complimentary, discriminatory, expedient, following, good, indulgent, opportune, plausive, plus, positive, preferential, profitable, propitious

Antonym: unfavourable [Brit, Cdn]