1. A man worth a million; a very rich man.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• millonaire,
• millioniare,
• millionare,
• billionnaire,
• milionare,
• milliionaire,
• mllionaires,
• billionare,
• millionary,
• millionares,
• millionar,
• millionairs,
• millionair,
• missionaire,
• millinaire,
• millionnaire,
• millionairres,
• milionaire,
• millionarie,
• millionars

• millenarist,
• millenary,
• millionairess,
• milliner,
• millenarian.

The adjective form of the word "millionaire" is "millionaire".

The plural of the "millionaire" can be the "millionaires".

The singular of the "millionaire" can be the "millionaire".