serendipitous

/ˌserənˈdɪpɪtəs/ · ser-un-DIP-ih-tusadjective

Occurring unexpectedly by chance and producing a fortunate or valuable result.

Use serendipitous to express this relationship precisely: occurring unexpectedly by chance and producing a fortunate or valuable result.

What serendipitous Really Means

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

1

Core quality

Occurring unexpectedly by chance and producing a fortunate or valuable result.

Example

A serendipitous observation led to the new material.

2

Attributive or predicative use

Use this adjective before a suitable noun or after a linking verb such as be or seem.

Example

Their collaboration began with a serendipitous meeting on a train.

3

Analytical distinction

Choose it when this exact descriptive quality matters; a related word may overlap without conveying the same trait.

Example

The archive's rediscovery was entirely serendipitous.

Use serendipitous Naturally

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

A serendipitous observation led to the new material.

Their collaboration began with a serendipitous meeting on a train.

The archive's rediscovery was entirely serendipitous.

Precision Matters

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

serendipitous

Means occurring unexpectedly by chance and producing a fortunate or valuable result.

vs.
inadvertent

Means unintentional and occurring without deliberate planning or awareness.

serendipitous

Means occurring unexpectedly by chance and producing a fortunate or valuable result.

vs.
inevitable

Means certain to happen or impossible to avoid, prevent, or escape.

serendipitous

Means occurring unexpectedly by chance and producing a fortunate or valuable result.

vs.
deliberate

Means consider or discuss a question carefully before making a decision.

serendipitous

Means occurring unexpectedly by chance and producing a fortunate or valuable result.

vs.
fortuitous

Means occurring by chance rather than design, often with a fortunate result.

Test serendipitous in Context

The valuable result occurred unexpectedly by fortunate chance.

1

The drug's useful secondary effect was a ___ discovery made while researchers were investigating an unrelated disease.

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