The child who swings between extremes has trouble finding the comfort zone—the area in which her body is comfortable, efficient, and alert.

All this is very bad news for coral, which has a fairly limited temperature comfort zone.

The desirable comfort zone indicated lies between 30 and 65% relative humidity.

The warmest temperature that defines this comfort zone is the critical high temperature, above which chickens suffer heat stress. The lowest temperature is the critical low, below which chickens suffer cold stress.

The demanding interview panel took him well out of his comfort zone.

Comfort zone

Meaning

Noun