glen meaning
EN
[ɡlɛn] [-ɛn] WGlen
- 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 word is Goidelic: gleann in Scottish and Irish Gaelic, glion in Manx. In Manx, glan is also to be found meaning glen. It is cognate with Welsh glyn.
- As the name of a river, it is thought to derive from the Irish word glan meaning clean, or the Welsh word gleindid meaning purity.
EN Glen 
- NounPLglens
Definition of glen in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Nouns
Source: Wiktionary
Grammatically, this word "glen" is a noun, more specifically, a countable noun.