A luta terminou.

A is the definite article, meaning the.

So a luta = the fight.

In Portuguese, articles are used more often than in English. While luta by itself can mean fight in a general sense, a luta points to a specific fight.

• A luta terminou. = The fight ended.
• Luta é comum nesse esporte. = Fighting is common in this sport.

Also, luta is a feminine noun, so it takes the feminine singular article a.

In Portuguese, every noun has grammatical gender, usually masculine or feminine.

Luta is feminine, so it uses:

• a for the
• uma for a/an
• feminine adjectives if needed

Examples:

• a luta
• uma luta difícil = a difficult fight

There is not always a perfect rule, so often you simply learn the noun together with its article:

• a luta
• o jogo
• a batalha

That helps you remember the gender naturally.

Terminou is the preterite form of the verb terminar.

Here it means:

• ended
• finished

It is the third person singular form, used with:

• ele = he
• ela = she
• você = you
• singular nouns like a luta

So:

• A luta terminou. = The fight ended.

This tense is used for a completed action in the past.

Both terminou and acabou can often be translated as ended or finished, and in many cases both are possible.

• A luta terminou.
• A luta acabou.

Both sound natural in Brazilian Portuguese.

A small nuance:

• terminar often sounds a bit more neutral or orderly: something reached its end
• acabar can feel slightly more like be over or come to an end

In many everyday contexts, the difference is small.

Because Portuguese usually follows the normal subject-verb order:

• A luta = subject
• terminou = verb

So the structure is:

• The fight ended not
• Ended the fight

This is very similar to English.

Portuguese can sometimes change word order for style or emphasis, but A luta terminou is the standard, neutral order.

Yes, you can.

Terminou a luta is also grammatical, but it sounds a little different in emphasis or style. It can feel more like:

• The fight is over
• The fight has ended

It may sound slightly more dramatic, more like an announcement, or more focused on the action of ending.

Still, A luta terminou is the most straightforward and basic version for learners.

A common Brazilian pronunciation is roughly:

tehr-mee-NOH

More carefully:

• ter sounds somewhat like tehr
• mi sounds like mee
• the stress is on the last syllable: nou

So the stress pattern is:

• ter-mi-NOU

And luta is roughly:

• LOO-tah

So the whole sentence sounds approximately like:

a LOO-tah tehr-mee-NOH

The exact sound changes a bit depending on region.

Portuguese often expresses tense directly in the verb itself.

In English, you may need extra words like:

• did end
• has ended

But in Portuguese, the verb form alone often carries that information:

• terminou already tells you it happened in the past

So:

• A luta terminou. literally corresponds to something like The fight ended

Portuguese does have compound tenses, but they are used differently from English.

Not exactly.

• A luta terminou = The fight ended
  This focuses on the event happening.

• A luta está terminada = The fight is finished
  This focuses on the resulting state.

So the first is an action in the past, and the second describes the condition after the action.

In many situations they point to the same real-world meaning, but grammatically they are different.

Yes.

Luta can mean:

• a physical fight
• a struggle
• a battle, in a broader sense

For example:

• a luta contra o câncer = the fight against cancer
• a luta por direitos = the struggle for rights

So in Portuguese, just like in English, the exact meaning depends on context. In your sentence, it most naturally means that some specific fight or struggle has ended.