Definition of "flirtatiousness" [flirtatiousness]

• The quality of being flirtatious (noun)

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• "Cath rose to the occasion, her eyes twinkling with what anyone else would have called flirtatiousness but Rowan recognized as sarcastic glee."
• "Disappointingly, there is little mischief to Bieber, no spin, precious little flirtatiousness, and zero winks."
• "And while friendliness can morph rapidly into flirtatiousness anywhere, it is especially easy online."