1
: sexually attracted to both men and women
bisexual people
She's bisexual.
2
: having both male and female sex parts
a bisexual plant
3
: relating to or involving two sexes
bisexual reproduction
Cite this Entry
“Bisexual.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/bisexual. Accessed 20 Jun. 2026.
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