"primary" in the noun sense
1. primary, primary election
a preliminary election where delegates or nominees are chosen
2. primary, primary feather, primary quill
one of the main flight feathers projecting along the outer edge of a bird's wing
3. primary
astronomy) a celestial body (especially a star) relative to other objects in orbit around it
4. 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"
"primary" in the adjective sense
1. primary
of first rank or importance or value direct and immediate rather than secondary
"primary goals"
"a primary effect"
"primary sources"
"a primary interest"
2. primary
not derived from or reducible to something else basic
"a primary instinct"
3. chief, main, primary, principal, master
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"
4. elementary, elemental, primary, basal
of or being the essential or basic part
"an elementary need for love and nurturing"
"a basal reader"
Source: WordNet® (An amazing lexical database of English)
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