This is the first in the new series – Framing the Dictionary.
“Overbearing pride or presumption; arrogance”
As you scroll further on the web page they offer this second definition:
Hubris [hew – bris] or hybris, the Greek word for ‘insolence’ or ‘affront’, applied to the arrogance or pride of the protagonist in a tragedy in which he or she defies moral laws or the prohibitions of the gods. The protagonist’s transgression leads eventually to his or her downfall, which may be understood as divine retribution or nemesis. Hubris is commonly translated as ‘overweening (i.e. excessively presumptuous) pride’. In proverbial terms, hubris is thus the pride that comes before a fall.