1. To produce thunder; to sound, rattle, or roar, as a discharge of atmospheric electricity; often used impersonally; as, it thundered continuously. Canst thou thunder with a voice like him? (job xl. 9)
Origin: AS. Unrian. See Thunder.
(Science: zoology) The chicken, or milk, snake. A small reddish ground snake (Carphophis, or Celuta, amoena) native to the Eastern united states; called also worm snake. Thunder tube, a fulgurite. See Fulgurite.
Origin: OE. Under, onder, oner, AS. Unor; akin to unian to stretch, to thunder, D. Donder thunder, G. Donner, OHG. Donar, Icel. Orr Thor, L. Tonare to thunder, tonitrus thunder, Gr. A stretching, straining, Skr. Tan to stretch. 52. See Thin, and cf. Astonish, Detonate, Intone, Thursday, Tone.