I. A standing round, a surrounding: “hostium,” Gell. 3, 7, 5: “aquae, aëris,” Sen. Q. N. 2, 7, 2 (as transl. of the Gr. ἀντιπερίστασις).—*
B. Concr., a surrounding circle, a band, troop: “angelorum,” Tert. Or. 3.—
II. Trop., the state, condition, circumstances, attribute, quality: “rerum negotiorumque,” Gell. 14, 1, 15; 14, 2, 2; Tert. Bapt. 17: hoc genus argumentorum sane dicamus ex circumstantiā, quia περίστασιν dicere aliter non possumus, * Quint. 5, 10, 104.