[{"Bold_text": "verb (used with object)", "List Items": ["to close, shut, or stop up (a passage, opening, etc.).Synonyms: plug , block , clog , obstruct", "to shut in, out, or off.", "Physical Chemistry.(of certain metals and other solids) to incorporate (gases and other foreign substances), as by absorption or adsorption."]}, {"Bold_text": "verb (used without object)", "List Items": ["Dentistry.to shut or close, with the cusps of the opposing teeth of the upper and lower jaws fitting together.", "Meteorology.to form an occluded front occluded front."]}]