: to place in the sunlight : expose to the sun's rays (as for curing, drying, ripening)

What is a simple definition of insulation?

1 : material that is used to stop the passage of electricity, heat, or sound from one conductor to another. 2 : the act of insulating : the state of being insulated insulation of wires. insulation. noun.

What does not insulated mean?

: not provided with insulation : not insulated a small, uninsulated shed an uninsulated attic.