Primary may refer to:
- Primary (astronomy), the larger of two co-orbiting bodies
- Primary mirror, principal light-gathering surface of a reflecting telescope
- Primary (band), from Australia
- Primary circuit, electrical circuit in a transformer that receives current, as opposed to secondary circuit
- Primary election, an election by which a political party selects and nominates a candidate
- Power line, electric power transmission line fed to or from a transformer
- Primary (film), 1960 documentary
- Primary (LDS Church), children's Sunday School organization
- "Primary" (song), by The Cure
- Primary, the oldest period in the Geologic time scale (obsolete)
- "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
- The first stage in a thermonuclear explosive, may also be used alone in a lower-yield nuclear explosive, see nuclear weapon design
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Famous quotes containing the word primary:
“Europe has a set of primary interests, which to us have none, or a very remote relation. Hence she must be engaged in frequent controversies, the causes of which are essentially foreign to our concerns. Hence, therefore, it must be unwise in us to implicate ourselves, by artificial ties, in the ordinary vicissitudes of her politics or the ordinary combinations and collisions of her friendships or enmities.”
—George Washington (1732–1799)
“A primary function of art and thought is to liberate the individual from the tyranny of his culture in the environmental sense and to permit him to stand beyond it in an autonomy of perception and judgment.”
—Lionel Trilling (1905–1975)
“Anyone who has obeyed nature by transmitting a piece of gossip experiences the explosive relief that accompanies the satisfying of a primary need.”
—Primo Levi (1919–1987)