decamillionaire

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noun

A person whose wealth amounts to ten million dollars (or other currency unit).

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Meanings

noundecamillionaire (plural decamillionaires)

plural decamillionaires

  1. A person whose wealth amounts to ten million dollars (or other currency unit).
  2. NigeriaA Nigerian language with at least ten million speakers (namely Hausa, Igbo, and Yoruba).

    The three major languages (Hausa, Igbo and Yoruba) are called “Decamillionaires” and they serve as regional Lingua Franca.

    2013, Anthony Ayodele Olaoye, “The Role of Indigenous Languages in National Development: A Case Study of Nigerian Linguistic Situation”, in International Journal of Applied Linguistics & English Literature, 2(3), May 2013, p. 30

Origin

From deca- + millionaire.

Full word history & related roots →
Cite this entry
APA

decamillionaire. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/decamillionaire

MLA

“decamillionaire.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/decamillionaire. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “decamillionaire,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/decamillionaire.

Source: decamillionaire on Wiktionary, CC BY-SA 4.0.