deviation

/,di:vi'eiʃn/
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deviation

The pilot corrected for the magnetic deviation during the flight.

Definition
  1. Noun:
    • A departure or divergence from a standard, norm, expected course, or established rule. This is the most common meaning, referring to a measurable difference or a behavioral departure.
    • The act of deviating or turning aside from a path, plan, or topic. This meaning focuses on the action itself.
    • (Statistics) A measure of difference between an observed value and a mean or expected value. This is a specific, quantitative use.
Usage and Examples
  • General Departure from a Standard:

    • Any deviation from the safety protocol must be reported immediately.
    • The product's quality showed a significant deviation from the company's usual standards.
  • Turning Aside from a Course or Topic:

    • The pilot corrected for the slight deviation from the flight path.
    • His speech was full of amusing deviations from the main subject.
  • Statistical/Mathematical Difference:

    • The scientist calculated the standard deviation of the data set.
    • A high deviation from the average score indicates inconsistent performance.
Advanced Usage
  • "Standard Deviation" (Statistics): A specific calculation that measures the amount of variation or dispersion in a set of values.

    • A low standard deviation means the data points are close to the mean.
  • "Mean Absolute Deviation": Another statistical measure of variability.

  • In a technical/engineering context: Often refers to a measurable error or divergence from a specification.

    • The angular deviation of the laser beam was minimal.
Variants and Related Words
  • Deviate (verb): To depart from an established course or standard.

    • The plane deviated from its scheduled route due to the storm.
  • Deviant (adjective/noun): Differing from accepted norms, especially in social or sexual behavior.

    • Deviant behavior is often studied in sociology.
  • Devious (adjective): Showing a skillful use of underhanded tactics to achieve goals; not straightforward. (Note: This has a strong negative connotation of dishonesty, unlike the more neutral "deviation").

Synonyms
  • Divergence: A process or state of separating from a course or standard.
  • Variation: A change or difference in condition, amount, or level.
  • Departure: The action of leaving, especially to start a journey, or a deviation from an established pattern.
  • Anomaly: Something that deviates from what is standard, normal, or expected.
  • Digression: A temporary departure from the main subject in speech or writing.
Related Phrases and Collocations
  • Tolerable deviation: An acceptable amount of difference from a standard.

    • The manufacturing process allows for a tolerable deviation of 0.5mm.
  • Root cause of deviation: The fundamental reason why a standard was not met.

    • The investigation focused on finding the root cause of the deviation.
  • Significant/Major deviation: A large or important departure.

  • Minor/Slight deviation: A small departure.
Notes on Meaning
  • Neutral vs. Negative Connotation: "Deviation" is often neutral, especially in technical contexts (e.g., statistics). However, it can carry a negative connotation when referring to a departure from rules, morals, or expected behavior (e.g., ).
  • Specific Fields: The precise meaning is highly context-dependent. In navigation, it's an error; in statistics, it's a calculation; in behavior, it's a departure from norms.
deviation

The pilot corrected for the magnetic deviation during the flight.

Noun
  1. a turning aside (of your course or attention or concern)
    • a diversion from the main highway
    • a digression into irrelevant details
    • a deflection from his goal
  2. deviate behavior
  3. the error of a compass due to local magnetic disturbances
  4. the difference between an observed value and the expected value of a variable or function
  5. a variation that deviates from the standard or norm
    • the deviation from the mean