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1.
1. One of the five members of the planet-saving team in the animated series "Captain Planet and the Planeteers" who is given a special ring that grants power over one of five elements (i.e. earth, fire, wind, water, and heart) and the ability to summon Captain Planet when the power of his/her ring is combined with the powers of the other four ring-bearers.

2. Any person who works to help a planet ecologically (e.g. prevents pollution, conserves energy and natural resources, recycles, etc.).
We're the Planeteers.
You can be one too.
'Cause saving our planet is the thing to do!
by jecowa April 07, 2007
 
2.
Retarded enviromentalist kids from Captain Planet. Went around ruining honest businesses, destroying Air conditioners, premoting terriorisim and worshipping Hitler, all while flying around in an earth friendly, solar powered airship. HQ was in the little gay kid's grass hut in Mexico.
Also had a lame part in the Captain Planet theme song.
...We're the Planeteers, you can be one to!
Cause saving our planet is the the thing to do
Looting and Polluting, is not the way
Hear what Captain Planet has to say...
by TheOx June 14, 2004