Is « sein » masculine or feminine?

« sein » is masculine. You say le sein.

Article forms

With the definite article le sein
With the indefinite article un sein
With the partitive article du sein

Plural

The plural is seins (les seins). A noun keeps its gender in the plural; only the article stops showing it.

Why the gender

sein ends in -in. Nouns ending in -in are usually masculine, so sein follows the pattern. The full rules by ending cover every common suffix.

Related words

Other common nouns that end the same way:

Common questions

Is « sein » masculine or feminine?

« sein » is masculine. You say le sein.

Is it « la sein » or « le sein »?

It is « le sein ». « la sein » is incorrect.


Check another word, or read the complete guide to French noun gender.