Definition

1. Adjective:
   • Unpredictable and irregular in movement, pattern, or behavior: Describes something that is not consistent, steady, or reliable, often changing in an unexpected way.
   • Deviating from the usual or expected course: Refers to something that does not follow a regular, fixed, or predictable path.

Usage

The word "erratic" is used to describe things that are inconsistent, unreliable, or prone to sudden, unpredictable changes. It often has a negative connotation, suggesting a lack of control or stability.

Examples

• Adjective:
  • The stock market has been highly erratic this week.
  • Her attendance at work was erratic, making it hard to rely on her.
  • The car's erratic steering was a cause for concern.

Advanced Usage

• "erratic in": showing inconsistency in a specific area.
  • He is erratic in his decision-making, often changing his mind at the last minute.
• "erratic behavior": actions that are unpredictable and unstable.
  • The patient's erratic behavior required close monitoring.

Variants and Related Words

• Erratically (adverb): in an erratic manner.
  • The signal was transmitting erratically.
• Erraticism (noun, rare): the quality of being erratic.

Synonyms

• Unpredictable: not able to be foreseen.
• Inconsistent: not staying the same throughout.
• Capricious: given to sudden and unaccountable changes of mood or behavior.
• Volatile: liable to change rapidly and unpredictably, especially for the worse.

Antonyms

• Steady: firmly fixed, supported, or balanced; not shaking or moving.
• Consistent: acting or done in the same way over time.
• Reliable: consistently good in quality or performance; able to be trusted.
• Stable: not likely to change or fail; firmly established.

Idioms and Phrases

• "erratic as the weather": extremely unpredictable.
  • His moods are as erratic as the weather.
• "follow an erratic course": to proceed in an irregular and unpredictable way.
  • The investigation followed an erratic course, full of unexpected turns.

Adjective

1. likely to perform unpredictably; sometimes it would start and sometimes it wouldn't"
   • erratic winds are the bane of a sailor
   • a temperamental motor
   • that beautiful but temperamental instrument the flute- Osbert Lancaster
2. having no fixed course
   • an erratic comet
   • his life followed a wandering course
   • a planetary vagabond
3. liable to sudden unpredictable change
   • erratic behavior
   • fickle weather
   • mercurial twists of temperament
   • a quicksilver character, cool and willful at one moment, utterly fragile the next