This is the 1638th most frequent Russian word.
второе
"Vторое" means "second" or "main course" (in a meal context).
Here, 'второе' refers to the ordinal numeral meaning second.
На обед я заказал второе блюдо.
For lunch, I ordered the second course.
In this sentence, 'второе' is used as a substantive adjective representing the second task.
У меня есть две задачи, и я не закончил второе.
I have two tasks, and I haven't completed the second one.
Here, 'второе' refers to a type of dish, specifically a main course in a meal.