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1.
The term Indie nowadays describes a current trend since around 2003 to consider "indie" a certain musical style rather than a stance towards commercialism.
This style is in most cases a mixture of wave, early punkrock, singer/songwriter music, electronica and above all whiney singing.

Ironically most bands among those "indie" bands are not part of an independent music scene, but as part of the musical mainstream rather dependent.
"I like Indie bands... like with guitars and stuff"
by OlderThanYou September 21, 2009
 
2.
A Indie band is a band that makes alternativ rock.
indie bands are fx: Babyshambles, The Cribs & The Arctic Monkeys
by Emende December 04, 2006