I.in crowds or masses, crowded together, mostly in pl.; πάντες ἁθρόοι Od., etc.; ἀθρόοι, of soldiers, in close order, Lat. conferto agmine, Hdt., Xen., etc.; also, πολλαὶ κῶμαι ἀθρόαι close together, id=Xen.
II.taken together, ἁθρόα πάντ᾽ ἀπέτισεν he paid for all at once, Od.; ἁθρόα πόλις the citizens as a whole, Thuc.; τὸ ἀθρόον their assembled force, Xen.; ἀθρόωι στόματι with one voice, Eur.; ἁθρόους κρίνειν to condemn all by a single vote, Plat.; κατήριπεν ἀθρόος he fell all at once, Theocr.
III.multitudinous, δάκρυ Eur., Plat.
IV.comp. ἁθροώτερος Thuc., etc.; later ἀθρούστερος Plut.