1 definition by p8ntball4life79

Top Definition
A large type of cannon that uses 2 or more rails (hence the name) that are charged with electromagnetic energy. They electromagnets propel a projectile at high speeds over great distances. These weapons do get very hot after use and therefore require great cooling power.
The US Navy is currrently working on a project to equip a new type of Destroyer with rail guns.
by p8ntball4life79 July 06, 2006
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×