A co-worker is an individual who works alongside others in the same organization or workplace. They share responsibilities, collaborate on projects, and contribute to the overall goals of the team. Co-workers can be in the same department or across different areas, and they often interact daily. Building positive relationships with co-workers is important for a healthy work environment. Good communication and teamwork can lead to increased productivity and job satisfaction. Co-workers may also support each other professionally and personally, creating a sense of community within the workplace.