erratic

What does "erratic" mean?
Erratic describes something that lacks a consistent pattern, purpose, or direction. Think of a ball bouncing unpredictably across a floor or a person whose mood shifts without warning; it is the quality of being irregular, unstable, or flighty. In usage, it is often applied to performance, weather, or human behavior that makes others feel uneasy because it is difficult to predict. While "random" implies a lack of order, "erratic" specifically suggests a departure from a previously expected, steady state.
"erratic" in conversation
Checking on a teammate
Is the server acting up again?
Is the server acting up again?
Yeah, the performance has been really erratic all morning.
Yeah, the performance has been really erratic all morning.
Used here to describe unstable technical performance.
Discussing a driver
I pulled him over because his driving was extremely erratic.
I pulled him over because his driving was extremely erratic.
Did he seem like he was under the influence?
Did he seem like he was under the influence?
Used to describe dangerous, unpredictable movement on the road.
"erratic" in a sentence
The baby took erratic steps as he learned to walk.
The baby took erratic steps as he learned to walk.
Her erratic sleep schedule made it difficult to stay focused at work.
Her erratic sleep schedule made it difficult to stay focused at work.
The erratic fluctuations in the stock market caused widespread panic among investors.
The erratic fluctuations in the stock market caused widespread panic among investors.