We were too concentrated on the meeting and we missed the last train.
Concentrate! Focus! Give it your all!
Hey! Stop breathing down my neck. I can’t concentrate.
When you collect to the middle of yourself, you are collecting towards your brain. All energy is going towards there, massing up in the middle, giving you extreme concentration abilities.
Just imagine a light in the middle of your brain, so concentrated that you're able to concentrate, shooting a little laser out of your forehead onto the thing you're concentrating on.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.