Definitions

1. noun

a sudden and complete collapse of a person’s mental or emotional state, often due to stress or pressure

“The financial crisis caused a major crackup in the investor’s confidence.”

2. noun

a sudden loud, sharp sound, especially one made by a sudden breaking or splitting

“The tree branch broke with a crackup, startling the nearby hikers.”

3. verb

to break or crack suddenly, often with a loud sound

“The stormy weather caused the windows to crackup.”

4. verb

to collapse or break down completely, often due to stress or pressure

“The athlete’s injuries caused her to crackup under the pressure of the competition.”