Added 8 October 2026 cairo noun Categories: PlacesUncommon Words noun ! Definition from WordNet 3.1, Princeton University. More about cairo at Wordnik → Where our words come from → A town at the southern tip of Illinois at the confluence of the Ohio and Mississippi Rivers. The capital of Egypt and the largest city in Africa; a major port just to the south of the Nile delta; formerly the home of the Pharaohs. Related Words: baghdadegyptmisrnicosiakarachiarabegyptiannanjingbangkok Back to today's word