Definition from Wiktionary, the free dictionary
upheaval (plural upheavals)
- The process of being heaved upward, especially the raising of part of the earth's crust.
- A sudden violent upset, disruption or convulsion.
2011 September 2, “Wales 2-1 Montenegro”, BBC:
- Since that upheaval Wales have won just once in seven games, beating Northern Ireland in the Nations Cup last May.
process of being heaved upward, especially of the earth's crust
sudden violent upset, disruption or convulsion