Η επίσκεψη του γιατρού είναι αύριο.

Η is the feminine singular definite article, so it means the.

• η επίσκεψη = the visit / the appointment
• επίσκεψη = a visit / visit in a more general sense

Greek uses the definite article very often, including in places where English might also use the. Here, η επίσκεψη is the subject of the sentence.

Επίσκεψη is a feminine noun.

You can tell from:

• the article η
• its common noun ending -η

So in the nominative singular:

• η επίσκεψη = the visit

This matters because the article and other words connected to the noun must match its gender, number, and case.

Because Greek is using the genitive case here.

• ο γιατρός = the doctor (nominative, basic dictionary form)
• του γιατρού = of the doctor / the doctor’s (genitive)

So:

• η επίσκεψη του γιατρού literally means the visit of the doctor or the doctor’s visit

Greek often uses the genitive where English uses ’s or of.

In this sentence, του γιατρού is genitive, so it means the doctor’s or of the doctor.

It is not the same as saying to the doctor.

A beginner can easily confuse this because English uses short little words like to, of, and ’s, while Greek often expresses these relationships through case endings.

So here:

• του γιατρού = of the doctor / the doctor’s

If you wanted to the doctor, Greek would normally use a different structure, often with a preposition such as στον γιατρό.

Yes, it can be.

Depending on context, it could mean:

• the doctor’s visit = the doctor is the one visiting
• or sometimes something closer to the doctor appointment / visit involving the doctor

Greek genitive phrases can sometimes be broad, just like English possessives can be. In real life, context usually makes the meaning clear.

If someone wants to be very explicit, they may rephrase it.

Είναι means is.

Greek usually keeps the verb to be in sentences like this:

• Η επίσκεψη του γιατρού είναι αύριο.
• literally: The doctor’s visit is tomorrow.

Unlike some languages, Greek normally does not drop the present-tense is in this kind of sentence.

Because αύριο is an adverb meaning tomorrow.

Just like in English, you usually do not need a preposition:

• It is tomorrow
• Είναι αύριο

Other common time adverbs work similarly:

• σήμερα = today
• χθες = yesterday
• αύριο = tomorrow

So Greek does not need something like on tomorrow here.

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

This sentence:

• Η επίσκεψη του γιατρού είναι αύριο.

could also appear as:

• Αύριο είναι η επίσκεψη του γιατρού.

Both are grammatical. The difference is usually about focus or emphasis.

• Η επίσκεψη του γιατρού είναι αύριο puts the topic first, then tells you when it is.
• Αύριο είναι η επίσκεψη του γιατρού emphasizes tomorrow more strongly.

Because nouns change form in Greek depending on their case.

For this noun:

• ο γιατρός = nominative singular
• του γιατρού = genitive singular

So the ending changes from -ός to -ού.

This is a very common pattern for masculine nouns like this. Learning the article together with the noun form helps a lot:

• ο γιατρός
• του γιατρού

A simple pronunciation guide:

• επίσκεψη ≈ eh-PEES-kep-see
• γιατρού ≈ yah-TROO

The written accent mark shows which syllable is stressed:

• επίσκεψη → stress on πί
• γιατρού → stress on the last syllable, τρού

Stress is important in Greek, so try to say the stressed syllable clearly.

Not exactly.

• επίσκεψη usually means visit
• ραντεβού usually means appointment

In context, η επίσκεψη του γιατρού may be understood as a doctor-related visit or appointment, but ραντεβού με τον γιατρό is often a more direct way to say appointment with the doctor.

So επίσκεψη and ραντεβού can overlap in some situations, but they are not always interchangeable.

It is:

• Η επίσκεψη του γιατρού = the subject noun phrase
• είναι = the verb
• αύριο = adverb of time

So the structure is:

[Subject] + [is] + [time expression]

More literally:

• The doctor’s visit is tomorrow.

This is a very common Greek sentence pattern.