This is the 11261st most frequent Spanish word.
entrerriano
A person or thing from Entre Ríos, a province in Argentina.
Here, 'entrerriano' is used as an adjective to describe someone originating from the province of Entre Ríos in Argentina.
Conocí a un hombre muy amable que es entrerriano.
I met a very kind man who is from Entre Ríos.
In this sentence, 'entrerriana' is an adjective used to characterize the culture related to the province of Entre Ríos.
La cultura entrerriana tiene influencias variadas.
The culture from Entre Ríos has various influences.
'Entrerrianos' functions as a noun here, referring to the people from the province and their association with typical music.