Insulate means to protect something by creating a barrier that prevents heat, cold, electricity, or sound from passing through. When builders insulate a house, they pack special materials like fiberglass or foam into the walls to keep warm air inside during winter and cool air inside during summer. This barrier works both ways: insulation keeps your house warm when it's freezing outside and cool when it's sweltering.

Insulation creates an island of comfort, separating the inside from harsh conditions outside. Electricians insulate wires by wrapping them in rubber or plastic so electricity can't escape and shock anyone. Scientists might insulate a container to keep ice cream frozen or hot chocolate steaming.

People also use insulate metaphorically to mean protecting someone from difficult experiences or harsh realities. If parents try to insulate their children from every disappointment, they might shield them so much that the kids never learn to handle challenges. A wealthy person might be insulated from everyday worries about money, living somewhat apart from the financial struggles that others face. In this sense, being too insulated can sometimes mean being disconnected from important experiences.