الهدف جميل.

In Arabic, the present-tense verb to be is usually not stated.

So Arabic says, literally:

the goal beautiful

but the meaning is:

The goal is beautiful.

This is completely normal in Modern Standard Arabic.
If you wanted the past, you would usually add كان:

كان الهدف جميلًا = The goal was beautiful.

A careful MSA reading is:

al-hadafu jamīlun

In normal pause, or in less formal pronunciation, you will often hear:

al-hadaf jamīl

A few pronunciation notes:

• الـ = al-
• هدف = hadaf
• جميل = jamīl
• In MSA, ج is usually pronounced like j in job

Here it is understood as a full sentence:

الهدف جميل = The goal is beautiful

Why?

Because الهدف is definite (the goal), and جميل is functioning as the predicate: beautiful.

If you wanted the beautiful goal as one noun phrase, you would normally say:

الهدف الجميل

In that version, الجميل is an adjective describing الهدف.

Because in this sentence جميل is the predicate, not part of the noun phrase.

• الهدف جميل = The goal is beautiful
• الهدف الجميل = the beautiful goal

This is an important pattern in Arabic:

• a definite noun
  • an indefinite adjective-like predicate often makes a full sentence
• a definite noun
  • a definite adjective makes a noun phrase

So the lack of الـ on جميل helps show that this is a sentence, not just a phrase.

الـ is the Arabic definite article, meaning the.

So:

• هدف = goal / target / objective
• الهدف = the goal

In this word, the l in الـ is pronounced clearly, because ه is a moon letter, not a sun letter.

So you say:

al-hadaf, not a doubled consonant form.

This is a nominal sentence in Arabic, called جملة اسمية.

It has two main parts:

• الهدف = the subject/topic (مبتدأ)
• جميل = the predicate/comment (خبر)

So the structure is:

[subject] + [description/comment]

That is a very common Arabic pattern.

With full case endings, it would be:

الهَدَفُ جَمِيلٌ

Romanized:

al-hadafu jamīlun

Why these endings?

• الهدفُ has -u because it is the subject of a nominal sentence
• جميلٌ also has -un because the predicate is nominative too

In ordinary writing, these short vowels are usually omitted, so you normally just see:

الهدف جميل

Because standard Arabic writing usually leaves out most short vowel marks.

So native readers normally read:

الهدف جميل

and understand from grammar and context that it is:

الهَدَفُ جَمِيلٌ

This is one of the first big adjustments for English speakers learning Arabic:
the written form often gives you the consonants and long vowels, but not every short vowel.

Yes. When a word like جميل describes the subject as the predicate, it normally agrees with it.

Here:

• الهدف is masculine singular
• so جميل is also masculine singular

If the noun were feminine, you would use جميلة instead:

• الفكرة جميلة = The idea is beautiful

So agreement is important.

Not necessarily.

جميل can mean:

• beautiful
• lovely
• nice
• good or pleasing, depending on context

So الهدف جميل could describe something literally beautiful, or more broadly something admirable, pleasing, or excellent.

Yes. هدف can mean several related things, depending on context, such as:

• goal
• target
• objective
• aim

So the exact English translation depends on the situation.

For example, in sports it may mean goal, while in a general or academic context it may mean objective or aim.