1. a preliminary election where delegates or nominees are chosen

    Synonyms : primary election
    Type Of : election
  2. of or being the essential or basic part

    Synonyms : basal, elemental, elementary
  3. one of the main flight feathers projecting along the outer edge of a bird's wing

    Synonyms : primary feather, primary quill
    Type Of : flight feather, quill, pinion, quill feather
  4. coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit

    Synonyms : primary coil, primary winding
    Type Of : coil
    Examples :
    • current through the primary coil induces current in the secondary coil
  5. most important element

    Synonyms : chief, main, master, principal
    Examples :
    • policemen were primary targets
  6. (astronomy) a celestial body (especially a star) relative to other objects in orbit around it

    Type Of : celestial body, heavenly body
  7. not derived from or reducible to something else; basic

    Examples :
    • a primary instinct
  8. of first rank or importance or value; direct and immediate rather than secondary

    Antonyms : secondary
    Examples :
    • primary goals
    • a primary effect
    • primary sources
    • a primary interest