The process of moving one's consciousness to one's spiritual or psychic center, leading to a feeling of great peace, calmness, strength, clarity and stability.
When we read this definition we all strive to fell this way at some point in the day. Weather you are a stay at home parent (like myself) or a layer or even working with people on a daily bases, things tend to get to us and we become off center.
Even while writing this I had to stop and center myself due to everything going on around me. It doesn't matter where you are you can always center yourself and I find myself using it throughout the day.
There is a helpful exercise you can do called bhramari breathing or if you have the the time take a walk outdoors and focus your attention on any large and massive object. Inhale and take the objects mass into yourself through your eyes and breath. (However, if it's a building, be sure to take in only it's mass and not the various human energies permeating it.) You soon will feel calm and stable.
I know the one thing I like to do is go outside and close my eyes and take everything around me in (the sun, trees, or even moon at night) I then feel myself becoming Centered and can go about my day or night with no problem.