This is the 14081st most frequent Russian word.
ок
"Ок" is the Russian informal equivalent of "OK," meaning "alright" or "fine."
Here, "ок" is not directly present in the Russian text; this is an illustrative example for change.
Спортсмен пробежал семь кругов и чувствовал себя на высоте.
The athlete ran seven laps and felt great.
In this sentence, "ок" is the root of the word "окно," which means "window."
Все посмотрели в окно, когда услышали громкий шум.
Everyone looked out the window when they heard a loud noise.
In this case, "ок" is adopted from English and is used as an informal expression to confirm understanding.