[{"Bold_text": "verb (used with object)", "List Items": ["to make different in some particular, as size, style, course, or the like; modify:to alter a coat; to alter a will; to alter course.", "to castrate or spay."]}, {"Bold_text": "verb (used without object)", "List Items": ["to change; become different or modified."]}, {"Bold_text": "noun", "List Items": ["David,1807–81,U.S. physicist."]}, {"Bold_text": "abbreviation for", "List Items": ["alteration."]}]