(verb) : ŏpāco, āvi, ātum, 1, id.
* To cover with shade, to shade (class.; syn.: obscuro, obumbro).
* Lit.; platanus ad opacandum hunc locum patulis est diffusa ramis,Cic. de Or. 1, 7, 28, cf. id. Fragm. ap. Macr. S. 6, 4: ubi pinguem dives opacat Ramus humum,Verg. A. 6, 195: humum taxus opacat,Luc. 6, 645: (sol terras) modo his modo illis ex partibus opacat,Cic. N. D. 2, 19, 49.
* Transf., to cover (poet.): opacat flore lanugo genas, Pac. ap. Fest. s. v. genas, p. 94 Müll.: opacat tempora pinus,Sil. 13, 331.—*
* Trop., to darken, obscure, Aug. Mor. Eccl. Cath. 1, 2.

s. TLL