a four stringed instrument. tuned a octave lower than your normal guitar.
many people overlook the bass as being simple but if anyone has any proper knowledge of the bass then they know that it is harder than it looks to play.
people may say if u can play guitar u can play bass but its not always like that. due to the basses heaviness and longer neck it can take a while to get used to!
guitars may be light but bass guitars can put up a fight!
a bassist is part of the glue in music along with the drummer sometimes they may want to take control but who can blame them? they hardly ever solo and dont like guitarists intruding on their sonic space.