idiosyncrasy

/ˌɪdiəˈsɪŋkrəsi/ · id-ee-uh-SING-kruh-seenoun

A distinctive habit, feature, or manner peculiar to an individual or group.

Use idiosyncrasy to express this relationship precisely: a distinctive habit, feature, or manner peculiar to an individual or group.

What idiosyncrasy Really Means

The word becomes easier to use when its closely related senses are separated and compared.

1

Core meaning

A distinctive habit, feature, or manner peculiar to an individual or group.

Example

Numbering every page twice was one of his idiosyncrasies.

2

Common noun frame

Use this noun in a complete noun phrase, adding the complement that identifies what it refers to when needed.

Example

The spelling reflects an idiosyncrasy of the manuscript.

3

Analytical distinction

Choose it when this exact concept matters; a related term may describe its cause, evidence, or opposite instead.

Example

A useful model should not mistake one local idiosyncrasy for a universal rule.

Use idiosyncrasy Naturally

Notice how the surrounding noun or clause reveals the exact shade of meaning.

Numbering every page twice was one of his idiosyncrasies.

The spelling reflects an idiosyncrasy of the manuscript.

A useful model should not mistake one local idiosyncrasy for a universal rule.

Precision Matters

Idiosyncrasy overlaps with several common words, but each carries a different emphasis.

idiosyncrasy

Means a distinctive habit, feature, or manner peculiar to an individual or group.

vs.
anomaly

Means something outside what is normal, expected, or consistent with a pattern.

idiosyncrasy

Means a distinctive habit, feature, or manner peculiar to an individual or group.

vs.
quintessential

Means representing the most typical, perfect, or defining example of a quality, class, or style.

idiosyncrasy

Means a distinctive habit, feature, or manner peculiar to an individual or group.

vs.
conventional

Means based on established practice, tradition, or general acceptance.

idiosyncrasy

Means a distinctive habit, feature, or manner peculiar to an individual or group.

vs.
eccentric

Means highly unconventional or noticeably unusual.

Test idiosyncrasy in Context

The habit is a distinctive peculiarity of one person.

1

Her habit of arranging books by their first sentence was a harmless ___.

Prepared byFirst Academy
Editorial responsibilityFirst Academy Academic Team
Updated3 August 2026
Selection and reviewRead our methodology