I.a blocking up, besieging, encompassing, a blockade of a place (class.): “obsessio templorum,” Cic. Dom. 3, 5: “militaris viae,” id. Pis. 17, 40: “castrorum,” Suet. Caes. 58: “obsessionem alicuius omittere,” Caes. B. C. 3, 24 fin.
obsessĭo , ōnis, f. obsideo,