• A primary by which direct nominations of candidates for office are made.
(from the article `primary election`) ...party members to vote, or open (nonpartisan), enabling all voters to choose which party`s primary they wish to vote in without declaring any party ...
Direct primary (Political Science) A primary by which direct nominations of candidates for office are made. 
[n] - a primary where voters directly select the candidates who will run for office
noun a primary where voters directly select the candidates who will run for office
a primary in which members of a party nominate its candidates by direct vote. Cf. indirect primary.