Thunder

1. n. An alarming or statrling threat or denunciation.
2. n. The sound which follows a flash of lightning; the report of a discharge of atmospheric electricity.
3. n. The discharge of electricity; a thunderbolt.
4. n. Any loud noise; as, the thunder of cannon.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.