This is the 2741st most frequent Russian word.
завтра
"Tomorrow."
In this sentence, 'завтра' functions as an adverb denoting the time when the action will take place — specifically, the day following today.
Завтра я пойду в кино.
Tomorrow I will go to the cinema.
Here, 'завтра' is used similarly as an adverb, indicating the scheduled day after today for the meeting.
Мы договорились встретиться завтра.
We agreed to meet tomorrow.
Again, 'завтра' is an adverb specifying the time frame of the future narration, implying the day following the current one.