Split cleanly into two equal parts; cut or divided straight down the middle.
ナイフでリンゴを真っ二つに切った。
I cut the apple cleanly in half with a knife.
意見は真っ二つに分かれた。
Opinions were split right down the middle.
その木は嵐で真っ二つに折れてしまった。
The tree was snapped cleanly in two by the storm.