الجمهور في مدرجات الملعب.

Because Arabic usually does not use a present-tense form of to be in simple sentences like this.

So:

• الجمهور في مدرجات الملعب literally looks like:
• the crowd / audience in the stadium stands

But it naturally means:

• The audience is in the stadium stands.

This is called a nominal sentence in Arabic. In the present tense, Arabic often just puts the subject and the description/location next to each other without is/are.

الجمهور means the الجمهور / the public / the crowd / the audience, depending on context.

In this sentence, it most naturally means:

• the crowd
• the audience
• the spectators

Even though it refers to many people, it is grammatically treated as a singular collective noun.

Because الجمهور is a collective noun. Arabic often uses singular words for groups seen as one unit.

So although the meaning is plural in real life, the grammar is usually singular:

• الجمهور كبير = The crowd is large
• not plural agreement in the usual sense

This is similar to how English can say the crowd is loud.

في is the preposition in.

So:

• في مدرجات الملعب = in the stadium stands

After في, the following noun phrase is in the genitive case in fully vowelled Arabic.

مدرجات is the plural of مُدَرَّج in this context, and it means:

• stands
• bleachers
• tiers of seating

So مدرجات الملعب means the stands of the stadium or more naturally the stadium stands.

Because مدرجات الملعب is an iḍāfa construction, often called a construct phrase.

In an iḍāfa:

• the first noun usually does not take الـ
• the second noun can make the whole phrase definite

So:

• مدرجات الملعب = the stands of the stadium = the stadium stands

Even without الـ on مدرجات, the whole phrase is definite because الملعب is definite.

الملعب means the stadium, the playing field, or the sports ground, depending on context.

Here, because of مدرجات before it, the phrase clearly means:

• the stadium
• or more literally, the sports venue whose stands are being mentioned

So مدرجات الملعب is best understood as the stadium stands.

Yes. In Arabic, this is a completely normal and complete sentence.

It has:

• الجمهور = the topic/subject
• في مدرجات الملعب = the predicate, telling where the audience is

So it functions exactly like a full sentence in English:

• The audience is in the stadium stands.

This is a very common Arabic pattern:

• subject + prepositional phrase

So:

• الجمهور = the subject
• في مدرجات الملعب = where they are

Arabic could sometimes change word order for emphasis, but this version is neutral and natural.

A careful pronunciation would be:

al-jumhūru fī mudarrajāti al-malʿab(i)

In normal unvowelled writing, the short case endings are usually not written, and in everyday reading many speakers do not pronounce them fully. So learners will often hear something closer to:

al-jumhūr fī mudarrajāt al-malʿab

In full case marking, the sentence would be:

الجمهورُ في مُدَرَّجاتِ المَلْعَبِ

Why?

• الجمهورُ takes ḍamma because it is the subject/topic of the nominal sentence
• مدرجاتِ is after في, so it is genitive
• الملعبِ is also genitive because it is the second part of the iḍāfa

So the endings would be:

• الجمهورُ
• مدرجاتِ
• الملعبِ

Yes. الجمهور في المدرجات means:

• The audience is in the stands

That version is slightly less specific. It just says in the stands.

But الجمهور في مدرجات الملعب is more explicit:

• The audience is in the stadium stands

So both are possible; the given sentence is simply more detailed.

Not exactly.

• الجمهور = the audience / the crowd / the spectators
• المشجعون = the fans / the supporters

So الجمهور is broader. It refers to the people attending or watching, not necessarily active supporters of one side.

In a sports context, either word may fit depending on what you want to emphasize.

Yes, the word is connected to the idea of steps or tiers. That is why it came to mean the stepped seating area in a stadium.

So a learner may notice that the word has an underlying sense related to something tiered or stepped, but in this context the normal translation is simply:

• stands
• bleachers
• terraces

That is the meaning you should use here.