Top Definition
a group of stars belonging to a dwarf galaxy that was devoured by the Milky Way Galaxy in a phenomenon called galactic cannibalism.
Scientists have recently discovered a Jupiter-sized planet belonging to the Helmi stream.
by uttam maharjan November 20, 2010
Free Daily Email

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

Emails are sent from We'll never spam you.