From Longman Dictionary of Contemporary Englishcomfort zoneˈcomfort ˌzone noun [countable usually singular] your comfort zone is the range of activities or situations that you feel happy and confident in
Examples from the Corpus
comfort zone• The easiest thing in this situation is to do nothing and rest miserably in the comfort zone of doing something predictable.• The team were still wrapped together in the comfort zone of a four-year period when each had cosseted and protected the other.• The width of the comfort zone can then be taken as 4 degrees, i.e., from-2 to.• Many investors struggle to get past the comfort zone of mutual funds.• The Chargers took the Raiders out of a lot of things, including their comfort zone.From Longman Business Dictionarycomfort zoneˈcomfort zone noun [countable usually singular] a situation in which someone feels safe and does not feel under pressureMost people, when faced with doing something that lies outside their comfort zone, will get nervous and panic. 