What does danger zone mean in cooking?

danger zone means: Foods can spoil at temperatures between 40 and 140 degrees Fahrenheit. This temperature range should not be exceeded for perishable food. (in Cooking Dictionary)

What else does danger zone mean?

• Perishable food shouldn’t be kept or placed out of refrigeration more than two hours. The Danger Zone for Food Safety is between 400 F. and 1400 F. Perishable food that has been left in this zone for longer than 2 hours should be thrown away. (in Cooking Dictionary)