Definition of engagingness in US English:

engagingness

noun

  • See engaging

    • ‘Yet, if you were to probe these customers on the matter, I'm sure they'd have no idea exactly what they expect the sites to offer, apart from fun, innovation, and engagingness.’
    • ‘The advertisment is among the company's top 20% for "recall, engagingness, convincingness and business-building potential among a target of women aged 18 to 65"’