Definition of timeliness in US English:

timeliness

noun

  • The fact or quality of being done or occurring at a favorable or useful time.

    ‘managers were happy with the timeliness of the deliveries’
    • ‘The timeliness of information matters.’
    • ‘The use of a mobile data-collection tool could increase accuracy and timeliness of clinical trial data collection.’
    • ‘Many seedings fail because of poor seed placement and lack of timeliness in planting.’
    • ‘The book deserves to be widely read because of its timeliness and clarity.’
    • ‘He failed to deal with his client's affairs with due care and timeliness.’

Pronunciation

timeliness

/ˈtīmlēnəs//ˈtaɪmlinəs/