Noun gender (masculine / feminine)
Summary
Every French noun is either masculine or feminine; its gender is fixed and controls the form of articles and adjectives, so it must be learned with the noun.
Explanation
In French, every noun carries a grammatical gender, masculine or feminine: le livre (the book) is masculine, la table (the table) is feminine. Unlike in English, this is not a matter of meaning for inanimate objects — there is nothing intrinsically 'male' about a book. The gender is simply a fixed grammatical property attached to the word, and it must be memorised as part of the word itself.
Gender matters because it spreads to everything around the noun. The article changes (le/la, un/une, du/de la), the adjective changes (un petit livre vs une petite table), and pronouns that refer back to the noun change (il/elle, le/la). Getting the gender wrong therefore creates a chain of agreement errors, not just one slip, which is why it is worth fixing the gender in memory from the start.
For nouns referring to people and many animals, gender usually follows natural sex: un homme / une femme, un acteur / une actrice, un chat / une chatte. Many such nouns form the feminine by adding -e or changing the ending (un étudiant → une étudiante; un vendeur → une vendeuse). But beware fixed nouns that keep one gender regardless of the person: une personne and une victime are always feminine, un médecin is traditionally masculine even for a woman (though féminisé forms like une médecin are increasingly used).
For everything else, word endings give useful but unreliable hints. Endings typically feminine: -tion/-sion (la nation), -té (la liberté), -ette (la baguette), -ence/-ance (la France), -ure (la voiture), -ée (la journée — but le musée, le lycée are masculine exceptions). Endings typically masculine: -age (le fromage — but la plage, la page, l'image are feminine), -ment (le moment), -eau (le bureau — but l'eau and la peau are feminine), -isme (le tourisme), -ier (le quartier). Treat these as tendencies with well-known exceptions, never as guarantees.
The reliable rule of thumb is therefore not to guess from meaning or even from the ending alone, but to learn each new noun with its definite or indefinite article: store une table, not table; un problème, not problème. When the article is hidden by elision (l'eau, l'avion), make a point of noting the gender separately. Endings can help you recall a gender you have half-forgotten, but the article you learned with the word is what you should trust.
Examples
le livre — the book (masculine)
la table — the table (feminine)
une décision importante — an important decision (-sion is typically feminine; the adjective importante agrees.)
le fromage et la plage — the cheese and the beach (-age is usually masculine (fromage) but plage is a common feminine exception.)
l'eau est froide — the water is cold (eau is feminine; froide is the feminine adjective. The article l' hides the gender.)
Cette personne est mon professeur. — This person is my teacher. (personne stays feminine even when it refers to a man.)
Common mistakes
le table
la table
English has no grammatical gender, so learners tend to treat every noun as masculine and reach for le by default. But table is feminine: « la table ». Gender is a fixed property of each noun, not a guess, and it controls the article and any adjective. The safe habit is to memorise every new noun together with its article — learn « une table », never just « table ».
Related rules
gendernounsendingsagreement