"attraction to both sexes" 1892, in translation of Krafft-Ebing; see bisexual + -ity.

Being attracted to or aroused by members of both genders. See Sexual Orientation.

n. the ability to be attracted to both males and females as partners. Often viewed as more of a sexual preference, It is experienced as both an attraction to the same sex (homosexuality and same-sex a [..]

Attraction of one person to both sexes. See hermaphrodite- intersexuality.

(n) showing characteristics of both sexes(n) sexual activity with both men and women

A bisexual individual is one who engages in both heterosexual and homosexual sex.

A sexual orientation or sexual attraction towards people of both sexes.

The sexual attraction or relationship between members of both the same and the opposite SEX.

The sexual attraction or relationship between members of both the same and the opposite SEX.

Sexual attraction directed toward persons of both sexes; predilection to perform erotic acts or obtain sexual gratification with persons of both sexes

Also bi. A person who is attracted to two sexes or two genders, but not necessarily simultaneously or equally. This used to be defined as a person who is attracted to both genders or both sexes, but since there are not only two sexes (see intersex and transsexual) and there are not only two genders (see transgender), this definition is inaccurate.