A person who has many times more than one million units of the local currency, but who is not a billionaire.(noun)
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Use "megamillionaire" in a sentence
"They're not even saying that about megamillionaire Jimmy Buffett -- and after the 6,000th hearing of "Margaritaville," that's pretty damned generous if you ask me."
"We do have one legitimate VIP: megamillionaire Huggy Henderson, philanthropist extraordinaire."
"Has Timothy Geithner ever had lunch with a non-megamillionaire who has lost his job or home because of the banking meltdown?"