A primary election; a preliminary election to select a political candidate of a political party. / The first year of grade school. / A base or fundamental component; something that is irreducible.

(US, politics, transitive, intransitive) To challenge (an incumbent sitting politician) for their political party's nomination to run for re-election, through running a challenger campaign in a primary election, especially one that is more ideologically extreme.

(US, politics) Mounting a challenge to an incumbent office-holder in a party primary.

present participle of primary

most important, most basic or essential

The quality or state of being primary, or first in time, act, or intention.

simple past tense and past participle of primary

plural of primary

Third-person singular simple present indicative form of primary

Research that involves the collection of previously ungathered data, rather than the analysis of that which is already available.