Added 10 October 2026 noonday /ˈnundeɪ/ noun Categories: TimeRare Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about noonday at Wordnik → Where our words come from → The time of noon; the time of day when the sun is highest in the sky, especially on a hot day. The time of greatest prosperity. Origin From noon + day. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: noonmiddaynoontidefarrardaymealdaytimeday-dawneveningdawn Back to today's word