Tarikh tutup untuk permohonan dalam talian ialah esok.

Tarikh means date, and tutup means closed / close / shut.

Together, tarikh tutup is a set phrase meaning closing date or deadline. In this sentence, the most natural English meaning is deadline.

So:

• tarikh = date
• tutup = closed / closing
• tarikh tutup = closing date, deadline

Because in Malay, the main noun usually comes first, and the word describing it often comes after it.

So:

• tarikh tutup = date closing → closing date
• not tutup tarikh

This is a very common pattern in Malay. Compare:

• kereta api = train
• rumah besar = big house
• tarikh lahir = date of birth

English often puts modifiers before the noun, but Malay often puts them after.

Here, untuk means for.

It links tarikh tutup with what the deadline applies to:

• tarikh tutup = closing date / deadline
• untuk permohonan dalam talian = for online applications

So untuk shows the relationship: the deadline for online applications

Mohon is the base word and means to apply or to request.

Permohonan is a noun formed from that root, and it means:

• application
• request
• the act/process of applying

In this sentence, permohonan means application(s).

So the difference is:

• mohon = to apply
• permohonan = application / application process

A learner does not need to fully master the word formation right away, but it is useful to notice that Malay often creates nouns from verb roots this way.

In this sentence, it most naturally means online applications or applications submitted online.

Breaking it down:

• permohonan = application(s)
• dalam talian = online

So permohonan dalam talian refers to applications that are made/submitted online.

Depending on context, Malay noun phrases can sometimes feel a bit broader than direct English equivalents, but here online applications is the right interpretation.

Yes, dalam talian is a standard Malay way to say online.

Literally:

• dalam = in
• talian = line

So literally it is something like in line / on the line, but idiomatically it means online.

This is the standard formal expression you will often see in:

• government notices
• websites
• official forms
• school or university announcements

Ialah is a linking word, similar to is in English in some formal sentence types.

Here it connects:

• Tarikh tutup untuk permohonan dalam talian
  with
• esok

So it works like: The deadline for online applications is tomorrow.

A very important point: in Malay, this kind of linking word is often omitted in everyday speech.

So you may also see or hear:

• Tarikh tutup untuk permohonan dalam talian esok.

That sounds less formal, but it is still understandable.

In short:

• ialah makes the sentence more formal and explicit
• it functions like a formal is

This is a very common learner question.

A simple learner-friendly answer is:

• ialah is often used when identifying or equating one thing with another
• adalah is often used before descriptions, explanations, or certain kinds of complements

In real life, official Malay usage can be a bit more flexible than textbook rules make it seem. In this sentence, ialah sounds natural and formal.

Also, many native speakers would simply leave both out:

• Tarikh tutup untuk permohonan dalam talian esok.

So the safest takeaway is:

• ialah is fine here
• adalah would be less natural here
• omitting the linker is also common in less formal Malay

Because Malay does not have a direct equivalent of English the and a/an in most cases.

So:

• tarikh tutup can mean the closing date or just a closing date
• the exact meaning comes from context

In this sentence, the context clearly makes it definite, so in English we translate it as:

• the closing date or
• the deadline

This is very normal in Malay: definiteness is often understood without an article.

Malay often does not mark plural unless it needs to.

So permohonan can mean:

• application
• applications

The context tells you which meaning is intended.

Here, English naturally uses applications, but Malay leaves it as permohonan because the plural is already understood.

If a speaker really wanted to make it explicitly plural, Malay can use repetition:

• permohonan-permohonan

But that would usually sound unnecessary here.

Yes. The original sentence sounds fairly formal, like something in an announcement or notice.

A more everyday version might be:

• Tarikh tutup permohonan dalam talian esok.

You may also hear shorter, less formal phrasing in context, especially in speech.

The original sentence is still perfectly good Malay, especially for:

• official notices
• websites
• forms
• announcements

So if you see ialah and the fuller structure, that usually signals a more formal register.