Translation guide
The English word "aberration" refers to something that deviates from what is normal, expected, or correct. In Japanese, the best translation depends on whether you mean a temporary anomaly, a moral deviation, an optical distortion, or a statistical outlier. This guide covers the most common and natural ways to express these nuances.
To describe something that is not typical, a departure from the usual pattern, often implying it is unusual or unexpected.
The most common and versatile word for 'abnormality' or 'anomaly'. It can be used in everyday speech and writing for anything that deviates from the norm, including weather, behavior, or test results.
今年の暑さは異常だ。
This year's heat is an aberration.
彼の行動は異常だった。
His behavior was an aberration.
Often used for an unusual or abnormal change, especially in nature or physical condition. It carries a nuance of something being 'off' or a sign of trouble.
体に異変を感じたら、すぐに病院に行ってください。
If you notice any aberration in your body, go to the hospital immediately.
自然界で異変が起きている。
Aberrations are occurring in the natural world.
Means 'exception'. Use this when the aberration is a rare case that does not follow the rule, but is not necessarily negative.
彼の成功は例外だ。
His success is an aberration.
この規則には例外はない。
There are no aberrations to this rule.
To describe an action or behavior that deviates from accepted moral standards, often implying it is wrong or perverse.
Directly means 'deviation' or 'digression' from a norm, rule, or standard. Commonly used for moral or behavioral aberrations.
彼の行為は社会規範からの逸脱だ。
His act is an aberration from social norms.
性的逸脱は犯罪になりうる。
Sexual aberrations can be criminal.
A set phrase meaning 'out of the ordinary' or 'beyond the pale'. It describes behavior that is wildly abnormal or irrational.
彼の常軌を逸した行動に皆が驚いた。
Everyone was shocked by his aberrant behavior.
To refer to a defect in a lens or optical system, or a deviation in scientific measurements.
The standard technical term for optical aberration (e.g., chromatic aberration, spherical aberration). Used in physics and photography.
このレンズは色収差が少ない。
This lens has little chromatic aberration.
球面収差を補正する。
Correct spherical aberration.
Means 'distortion' or 'warping'. Can be used for optical distortion in a general sense, but also for abstract distortions.
To describe a data point that deviates significantly from the rest, often in a scientific or analytical context.
Literally 'abnormal value'. The standard term for an outlier in statistics or data analysis.
このデータには異常値が含まれている。
This data contains aberrations.
A more colloquial term for 'outlier', often used in statistics and machine learning.
While 異常 can mean 'abnormal', using it alone for moral aberrations may sound vague. For clear moral judgment, use 逸脱 or 常軌を逸した.
彼の行動は逸脱している。
His behavior is an aberration.
異常 is a general term for abnormality, while 異変 implies a change or incident that is out of the ordinary, often with a sense of alarm. Use 異変 for sudden, noticeable changes in condition or environment.
Literally 'abnormal behavior'. Used in psychology or everyday contexts to describe actions that are not normal.
その患者は異常行動を示した。
The patient exhibited aberrations in behavior.
There is an aberration in the image.
Analyze after removing aberrations.