existing or occurring with something else, often in a lesser way; accompanying; concurrent: an event and its concomitant circumstances.
noun
2.
a concomitant quality, circumstance, or thing.
Origin: 1595–1605; < Latinconcomitant- (stem of concomitāns, present participle of concomitārī), equivalent to con-con- + comit- (stem of comes) comes + -ant--ant
1607, from Fr. concomitant, from L. concomitantem, prp. of concomitari "accompany, attend," from com- "with, together" + comitari "join as a companion," from comes (gen. comitis) "companion."