Thunder is an application framework for Flash MX that offers a flexible model for large-scale application development. Classes are included for all key development aspects: asset management, layout management, data management and event management.

The sound which follows a flash of lightning; the report of a discharge of atmospheric electricity.

The discharge of electricity; a thunderbolt.

Any loud noise; as, the thunder of cannon.

Thunder are an English hard rock band, who originally formed in 1989 when Terraplane broke up, leaving lead singer Danny Bowes and guitarist/main songwriter Luke Morley to form a new band, namely Thunder. Retaining drummer Gary James (popularly known as 'Harry' James) from Terraplane, they completed the line-up with bassist Mark 'Snake' Luckhurst and guitarist/keyboard player Ben Matthews. They were signed with EMI after performing a demo audition in 1989, and soon began recording their first album Backstreet Symphony.

"Thunder" is a song by Prince and the New Power Generation, from the 1991 album Diamonds and Pearls. It was issued as a 12-inch single picture disc in the UK only. The lyrics refer to the night Prince decided to withdraw The Black Album, rumored to have suffered a bad ecstasy trip.

Thunder is the first solo album by British guitarist Andy Taylor, released in 1987.