Lewis & Short

fulgŭro, āre, v. impers. [id.], to lighten (less freq. than fulgeo; in many MSS. the reading oscillates between the two words; cf. Spald. and Zumpt ad Quint. 2, 16, 19, and Mos. and Orell. ad Cic. N. D. 2, 25, 65).

  1. I. Lit.: noctu magis quam interdiu sine tonitribus fulgurat, Plin. 2, 54, 55, § 145: ex omnibus partibus caeli, id. 18, 35, 81, § 354: Jove tonante, fulgurante comitia populi habere nefas, Cic. Div. 2, 18, 43 Orell. N. cr.: fulgurat, cum repentinum late lumen emicuit, Sen. Q. N. 2, 57, 1.
  2. II. Trop.
    1. A. Of oratory (cf. fulgeo, I. B.): fulgurat in ullo umquam verius dicta vis eloquentiae? Plin. H. N. praef. § 5; Quint. 2, 16, 19 (v. fulgeo, I. B.), Plin. Ep. 1, 20, 19.
    2. B. To flash, glitter, glisten, shine (poet.): vetitoque domus jam fulgurat auro, Stat. Th. 4, 191: cernis, oculis qui fulgurat ignis! Sil. 12, 723.
      Part.: fulgŭrātus, a, um, pass. only as subst. plur.: fulgŭrāta, orum, n., things struck by lightning: omnibus fulguratis odor sulphuris inest, Sen. Q. N. 2, 21, 2.