primarily in WordNet English dictionary

1. for the most part
   "he is mainly interested in butterflies"
   chiefly  principally  primarily  mainly  in the main  chiefly  principally  primarily  mainly  in the main 
   
2. of primary import
   "this is primarily a question of economics"; "it was in the first place a local matter"
   primarily  in the first place  primarily  in the first place