concurrent /kəŋˈkʌɹənt/adjective 7noun 4forms 3 adjective7 •Happening at the same time; simultaneous.Such are the changes which science recognizes in the wire itself, as concurrent with the visual changes taking place in the eye. — 1865 •Belonging to the same period; contemporary. •Designed to run independently, rather than sequentially, using various mechanisms, such as threads, event loops or time-slicing.Informally, a concurrent program is one that does more than one thing at a time. […] However, this simultaneity is sometimes an illusion. — 2000 •Acting in conjunction; agreeing in the same act or opinion; contributing to the same event or effect.I join with these laws the personal presence of the king's son, as a concurrent cause of this reformation. — 1612 •Joint and equal in authority; taking cognizance of similar questions; operating on the same objects.the concurrent jurisdiction of courts •Running alongside one another on parallel courses; moving together in space. •Meeting in one point. noun4 •One who, or that which, concurs; a joint or contributory cause.To all affairs of importance there are three necessary concurrents […] time, industry, and faculties. — 1667 •One pursuing the same course, or seeking the same objects; hence, a rival; an opponent.Menander […] had no concurrent in his time that came neere vnto him — 1601 •One of the supernumerary days of the year over fifty-two complete weeks; so called because they concur with the solar cycle, the course of which they follow. •One who accompanies a sheriff's officer as witness. formsconcurrents · more concurrent · most concurrent