Gre‐ga″ri‐ous (?), a. [L. gregarius, fr. grex, gregis, herd; cf. Gr. � to assemble, Skr. jar to approach. Cf. Congregate, Egregious.] Habitually living or moving in flocks or herds; tending to flock or herd together; not habitually solitary or living alone. Burke.
No birds of prey are gregarious. Ray.
— Gre‐ga″ri‐ous‐ly, adv. — Gre‐ga″ri‐ous‐ness, n.