This is the 14641st most frequent German word.
mittelmäßige
"Average" or "mediocre."
Here, 'mittelmäßige' is an adjective describing the noun 'Leistungen.' It means that the performances were neither excellent nor terrible but average.
Die Leistungen des Teams waren mittelmäßige.
The team's performances were mediocre.
In this sentence, 'mittelmäßige' is used to qualify the noun 'Speisen,' indicating that the food was of average quality.
Im Restaurant servierten sie mittelmäßige Speisen.
The restaurant served mediocre food.
Here, 'mittelmäßige' expresses the average quality level of the movie, emphasizing its mediocrity.