Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Of or relating to both sexes.
- adj. Having both male and female reproductive organs; hermaphroditic.
- adj. Botany Denoting a single flower that contains functional staminate and pistillate structures; perfect.
- adj. Of, relating to, or having a sexual orientation to persons of either sex.
- n. A bisexual organism; a hermaphrodite.
- n. A bisexual person.
Century Dictionary and Cyclopedia
- Having the organs of both sexes in one individual; of two sexes; hermaphrodite. In botany, said of flowers which contain both stamen and pistil within the same perianth, and of mosses having antheridia and archegonia in the same involucre; synœcious. Also
bisexed . - In ethnology, characterized by an equal social development of both sexes.
Wiktionary
- adj. Having both male and female organs. See perfect.
- adj. Sexually attracted to persons of either sex.
- adj. Hermaphroditic.
- n. A person who is bisexual. Someone attracted to persons of either gender
GNU Webster's 1913
- adj. Of both sexes; hermaphrodite; as a flower with stamens and pistil, or an animal having ovaries and testes.
WordNet 3.0
- adj. having an ambiguous sexual identity
- adj. sexually attracted to both sexes
- n. a person who is sexually attracted to both sexes
Examples
“And while I found her discussions with older feminists like Shulman, who don't and never have used the label bisexual, even though they had had relationships with both men and women, very interesting, the younger women, including Featherstone and DiFranco, seemed to serve only as quotes to back up the assertions Baumgardner makes about herself.”
Look Both Ways: Bisexual Politics (What if No One's Watching?)
“In order to distinguish these two great types of fertilization we will use the term bisexual for the one and unisexual for the other.”
“I am somewhat embarrassed to admit this now, but I think I was afraid to claim the term "bisexual" because it seemed so finite, or too strong of a revealing label, like "gay.”
“But I don't want to be afraid of the label bisexual anymore.”
“I think that perhaps the label bisexual means very little to me.”
“My mom uses the term bisexual in the worst way-the hetero-friendly way bi being a phase.”
“The term bisexual is necessary to distinguish such individuals from trisexuals.”
“The word 'bisexual' nowhere appears in the book.”
“The term bisexual is an unnecessary distinction, because a faggot wants to defile anyone or anything he can get his hands on”
“The term bisexual is an unnecessary distinction, because a faggot wants to defile anyone or anything he can get his hands on. article about a "gay-friendly" high school.”
Lists
These user-created lists contain the word ‘bisexual’.
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Dramatic Nouns
Nouns to be used as descriptions while writing stories
night owl, early bird, hedonist, ascetic, derelict, explorer, radical, pity friend, cupid, truant, caretaker, guardian and 120 more...
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bi-
two; twice; every two; lasting two
biathlon, biannual, bicentennial, biennial, bisexual, binoculars, bigamy, biscotti, bilabial, bicep, bicuspid, bicycle and 19 more...

I. Lily C. "All great novels, all true novels, are bisexual."
-Milan Kundera Dec 15, 2010