This is the 111th most frequent Serbian word.
тада
"Тада" means "then" in English.
The word "тада" is used here to refer to a specific point in time in the past.
Срео сам је у граду и тада смо се упознали.
I met her in the city and that's when we got acquainted.
The word "тада" is used to indicate a condition determining the time context of an action.
Ако стигнеш до пет, тада ћемо кренути на вечеру.
If you arrive by five, then we will leave for dinner.
The word "тада" contrasts a past state with the current one, emphasizing the difference in time.