WordWeb Online

1. Encouraging or approving or pleasing
   "a favourable reply"; "he received a favourable rating"; "listened with a favourable ear"; "made a favourable impression"
   - favorable [US]
    
2. (of winds or weather) tending to promote or facilitate
   "the days were fair and the winds were favourable"
   - favorable [US]
    
3. Presaging or likely to bring good luck
   "a favourable time to ask for a raise"; "a favourable time to ask for a raise"
   - golden, favorable [US], lucky, prosperous
    
4. Inclined to help or support; not antagonistic or hostile
   "a government favourable to our interests"; "a government favourable to our interests"
   - friendly, favorable [US], well-disposed
    
5. Occurring at a convenient or suitable time
   - favorable [US]

See also: affirmative, affirmatory, amicable, approbative, approbatory, approving, complimentary, convenient, favourableness [Brit, Cdn], following, good, indulgent, plausive, propitious

Encyclopedia: Favourable