A glen is a valley, typically one that is long, deep, and often glacially U-shaped, or one with a watercourse running through it. Whittow defines it as a "Scottish term for a deep valley in the Highlands" that is "narrower than a strath".

The Gay and Lesbian Equality Network (GLEN) is an Irish gay rights group, based in Dublin, Ireland. The organisation was founded in 1988 by Kieran Rose and Christopher Robson. GLEN focuses on achieving change in legislation and social policy that will achieve full equality and inclusion for lesbian, gay and bisexual and transgender (LGBT) people in Ireland, and protection from all forms of discrimination. The board of directors comprises: Kieran Rose (chair); Maura Molloy; Arthur Leahy; Muriel Walls; Ciarán O'Cuinn; Nathalie Weadick; and Dr. Fergus Ryan.