primarypri·ma·ry /ˈpraɪməri-meri/ adjectiveadj1main or most importantIts primary business is developing and marketing new software.
The primary problem for the airlines is the recession.
It uses coal as its primary source of fuel.
2FINANCE relating to shares, bonds etc when they are ISSUED (=sold for the first time), and the markets where they are sold, rather than shares etc that are traded laterthe primary bond market