This is the 11211th most frequent Turkish word.
dünkü
"Dünkü" means "yesterday's" in English.
In this sentence, 'dünkü' is used as an adjective describing 'match' (maç), specifying that it occurred yesterday.
Dünkü maç çok heyecanlıydı.
Yesterday's match was very exciting.
Here, 'dünkü' is an adjective describing 'meeting' (toplantı), referring to the one held the day before the current day.
Dünkü toplantı hakkında ne düşünüyorsunuz?
What do you think about yesterday's meeting?
In this example, 'dünkü' modifies 'weather' (hava), indicating that it refers to the weather conditions on the previous day.