primary

Adjective

• of primary importance

• of or being the essential or basic part
  • an elementary need for love and nurturing
    

• 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
    

• not derived from or reducible to something else; basic
  • a primary instinct
    

• of first rank or importance or value; direct and immediate rather than secondary
  • primary goals
    
  • a primary effect
    
  • primary sources
    
  • a primary interest
    

Noun

• 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
    

• (astronomy) a celestial body (especially a star) relative to other objects in orbit around it

• one of the main flight feathers projecting along the outer edge of a bird's wing

• a preliminary election where delegates or nominees are chosen

Related words

• Synonyms: 
  basal , elementary , elemental , chief(a) , main(a) , primary(a) , principal(a) , master(a) , primary coil , primary winding , primary feather , primary quill , primary election