Портной уже здесь.

In Russian, the verb to be is usually omitted in the present tense.

So English The tailor is already here becomes simply:

• Портной уже здесь.

Russian does not normally say Портной есть уже здесь in everyday speech.

This is very common:

• Я дома. = I am at home.
• Она занята. = She is busy.
• Он здесь. = He is here.

So in this sentence, the idea of is is understood automatically.

Уже usually means already.

So:

• Портной уже здесь. = The tailor is already here.

It often suggests that something has happened sooner than expected, or that a state is now true:

• Он уже дома. = He is already home.
• Я уже знаю. = I already know.

In this sentence, уже tells you that the tailor has arrived and is here now.

Портной is in the nominative case.

That is because it is the subject of the sentence: the person who is here.

Even though there is no visible verb is, the sentence still has a subject-predicate structure:

• Портной = subject
• уже здесь = predicate idea, already here

So nominative is exactly what you would expect.

Here, портной is a noun meaning tailor.

It does look like an adjective form because Russian has many masculine words ending in -ой, and some nouns have adjective-like endings. But in this sentence, портной is clearly a noun naming a person.

For example:

• хороший портной = a good tailor

Here хороший is the adjective, and портной is the noun.

This word declines like an adjective-type noun in some forms, which is one reason it may look unusual to learners.

The stress is on the final -ой:

• портно́й

A rough English-style guide would be something like:

• par-TNOY

More carefully:

• пор sounds like por
• тн is a consonant cluster, pronounced together
• ой sounds roughly like oy in boy

So the stress is not on the first syllable.

Yes, Russian word order is more flexible than English word order.

The neutral version here is:

• Портной уже здесь.

But other orders are possible, depending on emphasis:

• Уже портной здесь.
• Здесь уже портной.
• Портной здесь уже.

These do not all sound equally neutral, though.
Портной уже здесь is the most straightforward, natural way to say The tailor is already here.

In Russian, moving words around often changes focus or emphasis, not the basic meaning.

Yes, often you can.

• Портной уже здесь.
• Портной уже тут.

Both can mean The tailor is already here.

Very roughly:

• здесь = here
• тут = also here, often a bit more conversational in many contexts

In many everyday situations, they are interchangeable.
Still, здесь is a very common, standard choice and is often what learners meet first.

Grammatically, портной is a masculine noun.

It usually refers to a male tailor, or it can sometimes be used in a more general dictionary-style sense for the profession. If you specifically want to refer to a female tailor, Russian may use:

• портниха = seamstress / female tailor

However, actual usage depends on context, style, and modern preferences.
For this sentence as written, a learner should understand портной as a masculine noun meaning tailor.

Russian has no articles like a or the.

So Портной уже здесь could mean:

• The tailor is already here
• A tailor is already here

Which one is meant depends on context.

In many learning materials, the natural translation would be The tailor is already here, especially if the tailor is someone already known in the situation.

This is a very common feature of Russian: context does the job that articles do in English.

Yes, absolutely. It is a perfectly complete sentence.

Russian often allows very compact present-tense sentences, especially with location or state:

• Он дома. = He is at home.
• Мама на кухне. = Mom is in the kitchen.
• Доктор уже здесь. = The doctor is already here.

So Портной уже здесь is short, but fully natural and complete.