Definition of overachievement in US English:

overachievement

noun

  • See overachieve

    • ‘By definition, overachievement cannot continue forever.’
    • ‘The 2005 budget should make more realistic revenue projections so as not to report such overachievement, the IMF resident representative office said on September 14.’
    • ‘And so begins a lifetime of overachievement and self-identification through testing!’
    • ‘The 21-year-old from Oxford had not expected to make the final and his seventh place was a rare example of British overachievement in the pool this week.’
    • ‘A lot of my overachievement and confidence comes from that.’

Pronunciation

overachievement

/ˌoʊv(ə)rəˈtʃivmənt//ˌōv(ə)rəˈCHēvmənt/