[gre.gar.i.ous] adj [L gregarius of a flock or herd, fr. greg-, grex flock, herd] (1668) 1 a: tending to associate with others of one's kind: social b: marked by or indicating a liking for companionship: sociable c: of or relating to a social group
2. a of a plant: growing in a cluster or a colony b: living in contiguous nests but not forming a true colony--used esp. of wasps and bees -- gre.gar.i.ous.ly adv -- gre.gar.i.ous.ness n