adj.
1.of first rank or importance or value
2.not derived from or reducible to something else
3.most important element
4.of or being the essential or basic part
5.of primary importance primary n.
1.a preliminary election where delegates or nominees are chosen
2.one of the main flight feathers projecting along the outer edge of a bird's wing
3.coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit