Il gatto è maschio.

Il is the masculine singular definite article, so it means the.

In Il gatto è maschio, it marks gatto as the cat.

Italian uses different forms of the depending on the sound that follows.

Use il before most masculine singular nouns:

• il gatto
• il libro
• il cane

Use lo before certain special sound combinations, such as:

• lo studente
• lo zaino
• lo psicologo

Because gatto starts with a normal g sound, the correct article is il.

Yes, gatto is grammatically masculine. But grammatical gender and real-life sex are not always the same thing.

A learner may notice that gatto is masculine and wonder why maschio is needed. The reason is that maschio makes the animal’s sex explicit: male.

So:

• gatto = grammatically masculine noun
• maschio = male

This is similar to the difference between grammatical gender and biological sex.

Not always.

Gatto can mean:

• a male cat, depending on context
• or sometimes cat more generally

If you want to clearly say female cat, the usual word is gatta.

So:

• gatto = male cat / cat
• gatta = female cat

That is why Il gatto è maschio can be useful: it removes any doubt.

È is the third-person singular form of essere, which means to be.

So:

• io sono = I am
• tu sei = you are
• lui/lei è = he/she is

In this sentence, è means is.

The accent is important because it distinguishes è from e.

• è = is
• e = and

So:

• Il gatto è maschio = The cat is male.
• il gatto e il cane = the cat and the dog

This is a very common spelling point in Italian.

Here maschio means male.

After essere, it works as the word that describes the subject:

• Il gatto è maschio.
• Il cane è grande.

With animals, maschio and femmina are very commonly used to indicate sex:

• Il gatto è maschio.
• La tartaruga è femmina.

Italian often leaves out the article after essere when stating a basic category or characteristic.

So è maschio is a natural way to say is male.

You may also hear è un maschio, but that sounds a bit more like:

• it is a male one
• or a stronger classification

For a simple statement, è maschio is the most straightforward form.

Gatto is pronounced roughly GAHT-toh.

A few useful points:

• the g is a hard g sound, like in go
• the tt is doubled, so it is held a little longer than a single t
• the stress is on the first syllable: GAT-to

So the whole sentence is roughly:

eel GAT-to eh MAS-kyo

Maschio is pronounced roughly MAS-kyo.

Important detail:

• sch before i gives a hard sk sound

So it is MAS-kyo, not MASH-io.

In normal standard Italian, no. You usually need the article:

• Il gatto è maschio.

Leaving it out sounds unnatural in an ordinary sentence.

Italian uses articles more often than English does, especially before singular count nouns.

The plural is:

I gatti sono maschi.

Changes:

• il → i
• gatto → gatti
• è → sono
• maschio → maschi

So:

• Il gatto è maschio.
• I gatti sono maschi.

Usually no, not in this meaning.

• maschio = male
• maschile = masculine

Maschile is used more for things like grammatical gender or style:

• un nome maschile
• genere maschile

For an animal’s sex, maschio is the right word.