'Infrastructure as code' in cloud computing refers to the practice of managing and provisioning computing resources through machine-readable configuration files, rather than physical hardware setup. This approach allows for automation, consistency, and repeatability in the creation and maintenance of infrastructure. It enables developers to use version control to track infrastructure changes, facilitating collaboration among teams and reducing the risk of human error. Infrastructure as code supports agile practices, enhances agility in deployment, and simplifies scaling and management of cloud resources, making it a critical component of modern cloud operations.