1. in an extremely cruel, wicked, or brutal manner
2. in an extremely bad or unacceptable manner
Usage: informal

Examples

• The prisoners were treated atrociously during the war.
• He behaved atrociously toward his employees.
• The team played atrociously in the championship game.
• She sang atrociously at the talent show.
• The weather was atrociously cold that winter.
• The movie was atrociously bad according to critics.