(colloquial, sometimes derogatory) A person who is or appears homosexual, or who has homosexual qualities.

(colloquial, sometimes derogatory) A person of any non-heterosexual sexuality or sexual identity.

(colloquial, sometimes derogatory) A person of any genderqueer identity.

(definite, with "the", informal, archaic) Counterfeit money.

(transitive, dated) To render an endeavor or agreement ineffective or null.

(UK, dialect, dated) To puzzle.

(slang, dated) To ridicule; to banter; to rally.

(slang, dated) To spoil the effect or success of, as by ridicule; to throw a wet blanket on; to spoil.

(social sciences) To reevaluate or reinterpret (a work) with an eye to sexual orientation and/or to gender, as by applying queer theory.

(slang, LGBT, neologism) To make a work more appealing or attractive to LGBT people, such as by not having strict genders for playable characters.

(dated outside Ireland, Scotland and Northern England) Weird, odd, or different; whimsical.

(Britain, informal, dated) Slightly unwell (mainly in "to feel queer").

(Britain, slang) Drunk.

(colloquial, sometimes derogatory) Homosexual.

(colloquial, sometimes derogatory) Non-heterosexual or non-cisgender: homosexual, bisexual, asexual, transgender, etc.

(broadly) Pertaining to sexual or gender behaviour or identity which does not conform to conventional heterosexual or cisgender norms, assumptions etc.

Queerly.

(Ireland) Very, extremely.