[{"Bold_text": "noun", "List Items": ["a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line.Compare plumb line plumb line."]}, {"Bold_text": "adjective", "List Items": ["true according to a plumb line perpendicular.Synonyms: square , straight , vertical", "Informal.downright or absolute."]}, {"Bold_text": "adverb", "List Items": ["in a perpendicular or vertical direction.", "exactly, precisely, or directly.", "Informal.completely or absolutely:She was plumb mad. You're plumb right."]}, {"Bold_text": "verb (used with object)", "List Items": ["to test or adjust by a plumb line.", "to make vertical.", "Shipbuilding. horn(def32) horn(def32).", "to sound with or as with a plumb line.", "to measure (depth) by sounding.", "to examine closely in order to discover or understand:to plumb someone's thoughts.", "to seal with lead.", "to weight with lead.", "to provide (a house, building, apartment, etc.) with plumbing ."]}, {"Bold_text": "verb (used without object)", "List Items": ["to work as a plumber."]}, {"Bold_text": "noun", "List Items": ["J(ohn) H(arold),1911–2001,British historian."]}]