This is the 149th most frequent Romanian word.
vineri
"Vineri" means "Friday" in English.
In this usage, 'vineri' is a noun indicating the day of the week, Friday.
Mergem la cină vineri seară.
We are going to dinner on Friday evening.
Here, 'vineri' specifies the temporal point, Friday, for the planned trip.
Plănuim o excursie pentru vineri.
We are planning a trip for Friday.
In this sentence, 'vineri' is used to anchor the time frame to the day Friday for the action of visitors coming.