primary in WordNet English dictionary

1. of primary importance
   basal  primary 
   
2. most important element
   "the chief aim of living"; "the main doors were of solid glass"; "the principal rivers of America"; "the principal example"; "policemen were primary targets"; "the master bedroom"; "a master switch"
   chief  main  primary  principal  master 
   
3. of or being the essential or basic part
   "an elementary need for love and nurturing"
   elementary  elemental  primary 
   
4. of first rank or importance or value; direct and immediate rather than secondary
   "primary goals"; "a primary effect"; "primary sources"; "a primary interest"
   primary 
   
5. not derived from or reducible to something else; basic
   "a primary instinct"
   primary 
   

1. a preliminary election where delegates or nominees are chosen
   primary  primary election 
   
2. one of the main flight feathers projecting along the outer edge of a bird's wing
   primary  primary feather  primary quill 
   
3. coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit
   "current through the primary coil induces current in the secondary coil"
   primary coil  primary winding  primary 
   
4. (astronomy) a celestial body (especially a star) relative to other objects in orbit around it
   primary