1 definition by A concerned individual,

Top Definition
A person who is sexually and emotionally attracted to both women and men.

They are stereotyped in many ways, but this is the basic scientific definition. Bi-sexuality is not a single shade of grey, but is in reality a spectrum. This spectrum includes varying levels of attraction to the two sexes.
I think that bi-sexuals are evil and sinful, because I'm a closed-minded biggot.
by A concerned individual, January 31, 2005

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