"The word 'pronoun' is like a broad linguistic church, covering a multitude of functions, and in some approaches to categorisation, 'their' is classified as a possessive pronoun rather than a possessive adjective. 'Determiner' as a descriptor has become popular during the last 30 years or so."
Feel free to be the first
Please review the linked page for context.
If you can think of something better than this,
please add it to the database