The noun primary has 3 senses (first 2 from tagged texts)
1. (3) primary, primary election -- (a preliminary election where delegates or nominees are chosen)
2. (1) primary, primary feather, primary quill -- (one of the main flight feathers projecting along the outer edge of a bird's wing)
3. primary coil, primary winding, primary -- (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")
Overview of adj primary
The adj primary has 5 senses (first 3 from tagged texts)
1. (16) primary -- (of first rank or importance or value; direct and immediate rather than secondhand; "primary goals"; "a primary effect"; "primary sources"; "a primary interest")
2. (8) primary -- (not derived from or reducible to something else; basic; "a primary instinct")
3. (7) chief, main, primary, principal -- (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")
4. elementary, elemental, primary -- (of or being the essential or basic part; "an elementary need for love and nurturing")