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bi
noun
Informal term for a person who is attracted to more than one gender; shortened form of bisexual and may also refer to someone who identifies as bigender or biceps. Used as both noun and adjective.
Etymology
Origin: English
Root: bisexual, biceps (clipped form) — "two, twice"
Example
"Sarah came out to her friends last year, explaining that she's bi and has dated people of different genders."
Usage Notes
Commonly used in LGBTQ+ communities and among younger speakers. It's informal and could seem too casual in formal contexts. It serves more as a self-identifier than an external label. Assumed to refer primarily to bisexuality but can indicate bigender identity, and less commonly biceps.