favourable in WordNet English dictionary

1. (of winds or weather) tending to promote or facilitate
   "the days were fair and the winds were favorable"
   favorable  favourable 
   
2. encouraging or approving or pleasing
   "a favorable reply"; "he received a favorable rating"; "listened with a favorable ear"; "made a favorable impression"
   favorable  favourable 
   
3. occurring at a convenient or suitable time
   "an opportune time to receive guests"
   favorable  favourable 
   
4. presaging or likely to bring good luck
   "a favorable time to ask for a raise"; "lucky stars"; "a prosperous moment to make a decision"
   golden  favorable  favourable  lucky  prosperous 
   

favourable in English Wiktionary