The definition of Operations and Maintenance (O&M) is a term used to describe the activities that are necessary for the operation of a business, organization, or system. O&M includes the maintenance of physical assets, the monitoring of operational performance, and the implementation of operational changes. O&M is an important part of any organization, as it ensures that the organization is running efficiently and effectively. O&M activities can include the regular maintenance of equipment, the development of operational procedures, the monitoring of performance metrics, and the implementation of changes to the operational environment. O&M is also responsible for ensuring that the organization is compliant with all applicable laws and regulations. O&M activities can help to reduce costs, improve efficiency, and increase customer satisfaction. Ultimately, O&M is essential for any organization to ensure that it is running smoothly and efficiently.