<p><strong>Noun</strong></p><ul><li>knowledge of or instruction in the basic principles of a subject: You'll need a thorough grounding in linguistics to understand the lecture.</li><li>Aeronautics: the act of restricting an aircraft to the ground because of bad weather, the unsatisfactory condition of the aircraft, etc.: The grounding of the aircraft due to fog meant the passengers were stranded.</li></ul><p><strong>Adjective</strong></p><ul><li>giving or relating to a feeling of being mentally or emotionally balanced due to a peaceful, practical, or realistic outlook: Her down-to-earth point of view made her a grounding presence in their lives.</li><li>Electricity: being or relating to a conducting connection between an electric circuit or equipment and the earth or some other conducting body: Check that all grounding wires are intact before beginning further repairs.</li></ul>