Ο γύρος τελείωσε.

ο is the masculine singular definite article in the nominative case. It usually corresponds to the in English.

So:

• ο γύρος = the round / the gyro / the turn, depending on context

In this sentence, ο shows that γύρος is the subject of the sentence.

The ending -ος is a very common ending for masculine nouns in Greek.

Here, γύρος is a masculine singular noun. In the sentence Ο γύρος τελείωσε, it is in the nominative singular, because it is the subject.

A learner may notice that many masculine nouns look similar:

• ο φίλος = the friend
• ο δρόμος = the road
• ο γύρος = the round / gyro / turn

Not every noun ending in -ος is masculine, but very many are.

τελείωσε is the 3rd person singular aorist of τελειώνω, which means to finish or to end.

So literally it means something like:

• finished
• ended

Because the subject is singular (ο γύρος), the verb is also singular:

• ο γύρος τελείωσε = the round ended / the round is over

This is a very common Greek way to express that something has come to an end.

Greek often uses a past/completed form where English prefers a present expression like is over.

So:

• Ο γύρος τελείωσε.
  can naturally mean
  The round is over.

Even though τελείωσε is formally a past tense form, Greek uses it very naturally to announce that something has just ended.

English focuses on the current state: it is over.
Greek often focuses on the completed event: it ended.

Both point to the same situation.

It can mean both, depending on context.

With τελειώνω, Greek can express either:

• something finishes itself / ends
• someone finishes something

Examples:

• Η ταινία τελείωσε. = The movie ended.
• Τελείωσα τη δουλειά. = I finished the work.

So in Ο γύρος τελείωσε, the meaning is intransitive:
The round ended.

A good approximate pronunciation is:

o YEE-ros te-LEE-o-se

A more careful pronunciation is roughly:

[o ˈʝiros teˈli.ose]

A few helpful points:

• γ before υ / ι / ε / αι often sounds like a soft y sound to English ears
• ύ in γύρος is pronounced like ee
• εί in τελείωσε also sounds like ee
• The stress matters:
  • ΓΥ-ρος
  • τε-ΛΕΙ-ω-σε

The accent marks show which syllable is stressed.

• γύρος → stress on the first syllable: ΓΥ-ρος
• τελείωσε → stress on the λεί syllable: τε-ΛΕΙ-ω-σε

In modern Greek, these written accents are very important because stress is part of correct pronunciation.

If you ignore the stress, people may still understand you, but your Greek will sound much less natural.

Yes. Greek word order is more flexible than English word order.

You can say:

• Ο γύρος τελείωσε.
• Τελείωσε ο γύρος.

Both are correct.

The difference is usually about focus or style, not basic meaning.

Very roughly:

• Ο γύρος τελείωσε. = neutral, straightforward
• Τελείωσε ο γύρος. = may sound a little more like an announcement: The round has ended

Because Greek marks grammar with endings and articles, it does not rely on word order as strictly as English does.

Yes, γύρος has several meanings depending on context. Common ones include:

• round
• turn
• lap
• tour
• gyro

So Ο γύρος τελείωσε could mean different things in different situations, such as:

• The round ended
• The lap is over
• The gyro is finished (less likely unless the context is food)

Greek relies heavily on context here, just as English does with words that have multiple meanings.

Because this sentence does not actually use to be in Greek.

English often says:

• The round is over

But Greek says:

• The round ended
• literally: Ο γύρος τελείωσε

So there is no need for a word like είναι here.

If you said Ο γύρος είναι..., you would be building a different kind of sentence.

Yes, it is similar, but not exactly the same.

• Ο γύρος τελείωσε. = The round ended / The round is over
• Ο γύρος έχει τελειώσει. = The round has finished / The round has ended

The version with έχει τελειώσει is a perfect construction and puts more emphasis on the result being completed.

In everyday speech, τελείωσε is extremely common and very natural for announcements like It’s over or It’s finished.

You would normally add δεν before the verb:

• Ο γύρος δεν τελείωσε.

This means:

• The round didn’t end
• or, depending on context, The round is not over

δεν is the standard negation word used before finite verbs in Greek.

It is completely normal everyday Greek. It sounds natural in many situations, for example:

• sports
• games
• races
• TV shows
• casual conversation

It is short, clear, and idiomatic. A Greek speaker would readily use a sentence like this in normal speech.