Definition of "monoplanes" [monoplanes]

• Plural form of monoplane. (noun)

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• "'single-deckers' (as the Germans call monoplanes); which had the effect of reducing the wing-loading."
• "I mean ... when monoplanes began outperforming, biplanes, they became the standard."
• "His was the first class to train on monoplanes as opposed to the World War I-style biplanes."