Definitions

1. adjective

the most unpleasant or frightening

“She thought the horror movie was the awfullest thing she had ever seen.”

2. superlative

the most extreme or severe

“The awfullest weather we had that year was during the storm.”

3. noun

a person or thing that is considered to be the most unpleasant or frightening

“The awfullest monster in the movie was the giant spider.”