primary - definition, thesaurus and related words from WordNet-Online

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Adjective primary has 5 senses

primary - of first rank or importance or value; direct and immediate rather than secondhand; "primary goals"; "a primary effect"; "primary sources"; "a primary interest"
Antonyms: secondary, alternate, alternative, auxiliary, subsidiary, supplemental, supplementary, collateral, indirect, secondhand, second-string, standby, tributary, utility, substitute, vicarious, thirdhand
primary - not derived from or reducible to something else; basic; "a primary instinct"
Antonym: derived (indirect, via underived)
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"
Antonym: unimportant (indirect, via important)
elementary, primary - of or being the essential or basic part; "an elementary need for love and nurturing"
Antonyms: incidental, incident (indirect, via basic)
basal, basic, primary - of primary importance; "basic truths"
Antonyms: inessential, unessential (indirect, via essential)

Noun primary has 3 senses

primary, primary election - a preliminary election where delegates or nominees are chosen
--₁ is a kind of election
--₁ has particulars: direct primary
primary, primary feather, primary quill - one of the main flight feathers projecting along the outer edge of a bird's wing
--₂ is a kind of flight feather, pinion, quill, quill feather
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"
--₃ is a kind of coil
--₃ is a part of transformer