-Neal Stephenson, "Snow Crash"
Batman is a higher state of being particular to fictional worlds. In any given universe, the Batman is that world's biggest bad-ass. This bad-ass is represented numerous ways- strength, toughness, genius, etc. This accompanies strong, authoritarian personalities and immense will.
Though they are not usually the most powerful person in their worlds, they are most certainly the Winners. It is nearly impossible to stop one who has attained Batman. Their will to survive/fight/win is simply too strong.
They're known for taking things "too far". This is quite simply because attaining Batman requires that you're more than a little crazy. Sane people simply would not do the things Batman does. Batman even scares the other good guys.
He was eventually adapted to television through movies and his own animated series by Warner Bros. A parody starring Adam West as Batman has diluded some people about the real theme of the series.
Like Superman, he was given a tragic past and a reason to fight. But, unlike Superman, he has no powers of his own, and relies on theatrics and fear to get his message across. He dresses like a Bat to invoke fear in his enemies.
He has a network of associates known as the "Bat Family," which includes: Nightwing (Dick Grayson, the first Robin), Robin (Tim Drake), Oracle (Barbra Gordon, the first Batgirl), Batgirl (Cassandra Cain). Previously, he has taken Jason Todd and Stephine Brown under his wing, both as Robins (the second and fourth ones, respectively), and both were murdered.
Since his inception, Batman has appeared in comic books, cartoons, movies, plays, and various other media. He currently stars, and is featured, in various DC comic books.
also see: The Batman, The Dark Knight, Bruce Wayne, vengence, the night
(2) v. To suddenly appear or disappear without bringing attention to oneself, as Batman is known for doing.
(2) "I didn't even see her leave! She pulled a total Batman!"