a. sociable; seeking and enjoying the company of others
Natural selection in gregarious animals operates upon groups rather than upon individuals.
Sentence in Classic:
Even now I am certain that those seas are not, and perhaps never can be, in the present constitution of things, a place for his habitual gregarious resort.
Moby Dick By Herman Melville Context
It was so that the gregarious animals had overcome the predaceous; it was so, in human history, that the people had mastered the kings.
The Jungle By Upton Sinclair Context