The word
Primary when used alone may refer to:
- United States presidential primary
- Primary elections in Italy
- Primary Flight Training, in the U.S. Navy
- Primary FRCA, academic examination for anaesthetists in the U.K.
- Primary ideals, a concept in commutative algebra
- Primary Music, Israeli record label
- Primary school, a school providing primary education
- Primary, the oldest period in the Geologic time scale
- "Primary", a song by Spoon from the album Telephono
- Primaries, remiges (wing feathers) in birds
- Primaries or primary beams, in E. E. Smith's science-fiction series Lensman
- Primary colour
- Primary field, a type of field in conformal field theory
- Primary partner, someone central to the intimate life of a person who practices polyamory
- Primary source