LGBT ageing addresses issues and concerns related to the ageing of lesbian, gay, bisexual and transgender (LGBT) people. Older LGBT people are marginalised by: a) younger LGBT people, because of ageism; and b) by older age social networks because of homophobia, biphobia, transphobia, heteronormativity (the assumption that everyone is heterosexual), heterosexism (the privileging of heterosexuality), prejudice and discrimination towards LGBT people.