Infrastructure refers to the basic physical systems and facilities that a society needs to function. Think of infrastructure as the foundation that makes modern life possible: roads and bridges that let people travel, water pipes that bring clean water to homes, power lines that deliver electricity, sewer systems that carry waste away, and internet cables that connect computers.

When a city plans its infrastructure, officials think about what people need every day. Schools need buildings. Firefighters need fire stations. Families need clean water flowing from their taps and trash collection from their curbs. All of these systems working together form a community's infrastructure.

Infrastructure often goes unnoticed until something breaks. When a water main bursts and floods a street, or when a bridge closes for repairs and traffic backs up for miles, people suddenly realize how much they depend on these systems. Building and maintaining infrastructure requires enormous planning and investment, but it pays off by making life safer, healthier, and more convenient for everyone.

The word can also describe basic systems in other contexts. A company might build its computer infrastructure by setting up servers and networks. A teacher might think about classroom infrastructure, like desks, supplies, and learning materials that students need to succeed.