Nominal group (functional grammar)

In systemic functional grammar (SFG), a nominal group is a group of words that represents or describes an entity, for example The nice old English police inspector who was sitting at the table with Mr Morse. Grammatically, the wording "The nice old English police inspector who was sitting at the table with Mr Morse" can be understood as a nominal group (a description of someone), and functions as the subject of the information exchange and as the person being identified as "Mr Morse".

Source: Wikipedia — Nominal group (functional grammar) (CC BY-SA 4.0)