Noun melt down has 2 senses
  1. meltdown, nuclear meltdown - severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping
    --1 is a kind of overheating
  2. meltdown - a disaster comparable to a nuclear meltdown; "there is little likelihood of a meltdown comparable to the American banking collapse in March 1933"
    --2 is a kind of calamity, catastrophe, disaster, tragedy, cataclysm
,Verb melt down has 1 sense
  1. melt, run, melt down - reduce or cause to be reduced from a solid to a liquid state, usually by heating; "melt butter"; "melt down gold"; "The wax melted in the sun"
    --1 is one way to dissolve, resolve, break up
    Sample sentences:
    Something ----s
    Somebody ----s something
    Something ----s something
,
TOP