1. A place, activity, situation, or psychological state in which a person feels free from anxiety and is within their of ability, experience, security, and/or control. Though it is often outside your comfort zone, traveling to foreign countries gives you a much greater perspective on how other people in the world live. The new job is a little out of my comfort zone, but it will give me a great opportunity to see what I'm truly capable of.

2. The temperature range wherein the human body feels naturally comfortable, being neither too hot nor too cold. Many retired Americans, being more sensitive to the cold, settle in Florida, where the balmy weather better suits their comfort zones.