Definition of queers:
(adj) :
(colloquial, sometimes derogatory) Non-heterosexual or non-cisgender: homosexual, bisexual, asexual, transgender, etc.
(adj) :
(loosely) Pertaining to sexual or gender behaviour or identity which does not conform to conventional heterosexual or cisgender norms, assumptions etc.
(adj) :
(colloquial, sometimes derogatory) Homosexual.
(n) :
(colloquial, sometimes derogatory) A person of any non-heterosexual sexuality or sexual identity.
(n) :
(colloquial, sometimes derogatory) A person of any genderqueer identity.
(n) :
(colloquial, sometimes derogatory) A person who is or appears homosexual, or who has homosexual qualities.