This is the 747th most frequent Russian word.
середине
"Середине" means "middle" or "center" in English.
The word 'середине' is used in the role of a prepositional case noun indicating the central part of a specific time period, 'day.'
Я встретил его в середине дня.
I met him in the middle of the day.
In this case, 'середине' specifies the location within a sequence, 'queue,' indicating an approximate central position.
Он оказался примерно в середине очереди.
He ended up roughly in the middle of the queue.
Here, 'середине' denotes the central part of the physical object 'bridge,' in the prepositional case.