concurrent

sifat adjective

1. Joint and equal in authority; taking cognizance of similar questions; operating on the same objects. the concurrent jurisdiction of courts
2. Happening at the same time; simultaneous.
3. Belonging to the same period; contemporary.
4. Acting in conjunction; agreeing in the same act or opinion; contributing to the same event or effect.

ot noun

1. One who, or that which, concurs; a joint or contributory cause.
2. One pursuing the same course, or seeking the same objects; hence, a rival; an opponent.
3. 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.
4. One who accompanies a sheriff's officer as witness.