1. extremely bad or unpleasant
2. causing fear or terror

Examples

• The weather was dreadful all week.
• She had a dreadful headache.
• The movie received dreadful reviews.
• There was a dreadful accident on the highway.
• The dreadful storm kept everyone indoors.
• His cooking skills are absolutely dreadful.
• The dreadful noise woke the entire neighborhood.