कोर्ट पर सीमा रेखा है।

कोर्ट here means a sports court, such as a tennis court, badminton court, basketball court, etc.

It is a borrowing from English court. Modern Hindi uses many loanwords like this, especially for sports, technology, and everyday urban vocabulary.

So in this sentence, कोर्ट is not talking about a legal court. The context makes it clear that it means a playing surface.

पर is a postposition that often means on, upon, or sometimes at.

In कोर्ट पर सीमा रेखा है, पर is used because the boundary line is understood as being on the surface of the court.

A useful way to think about it:

• पर = on / on top of / at
• में = in / inside

So:

• कोर्ट पर = on the court
• कोर्ट में = in the court

For a line drawn on a surface, पर is the natural choice.

सीमा रेखा is a compound noun meaning boundary line.

Breaking it down:

• सीमा = boundary, limit
• रेखा = line

Together, they mean a line that marks the limit or edge.

In sports contexts, this refers to the line marking the boundary of the playing area.

Hindi word order is more flexible than English, but the most basic pattern is often:

place + thing + है

So this sentence is structured like:

• कोर्ट पर = on the court
• सीमा रेखा = boundary line
• है = is

This gives the sense of There is a boundary line on the court.

You could also say:

सीमा रेखा कोर्ट पर है।

That would still be grammatical, but it feels more like The boundary line is on the court, with a bit more focus on the boundary line itself rather than introducing its existence.

Hindi does not use articles the way English does.

So सीमा रेखा है can mean:

• there is a boundary line
• the boundary line is there

Which exact translation sounds best depends on context.

English requires an article, but Hindi usually leaves that idea unspoken unless something else makes it specific, such as:

• एक सीमा रेखा = a boundary line
• context alone = the boundary line / a boundary line

In your sentence, एक is not necessary.

है is the present-tense form meaning is.

In this sentence, it shows existence or location:

• सीमा रेखा है = there is a boundary line / the boundary line is present

Because सीमा रेखा is singular, है is used.

If it were plural, you would use हैं:

• कोर्ट पर सीमा रेखाएँ हैं।
• There are boundary lines on the court.

It is singular.

That is why the verb is है rather than हैं.

If you wanted the plural, it would usually be:

• सीमा रेखाएँ = boundary lines

So:

• कोर्ट पर सीमा रेखा है। = There is a boundary line on the court.
• कोर्ट पर सीमा रेखाएँ हैं। = There are boundary lines on the court.

Yes, it is grammatical and understandable.

However, in everyday speech, especially in sports contexts, many speakers might say something a little more casual, such as:

• कोर्ट पर लाइन है।
• कोर्ट पर सीमा रेखा बनी है।
• कोर्ट पर बॉउंड्री लाइन है।

सीमा रेखा sounds a bit more formal or textbook-like. It is still correct, just slightly more formal than casual spoken Hindi.

A simple transliteration is:

koṛṭ par sīmā rekhā hai

A rough pronunciation guide:

• कोर्ट = koṛṭ
• पर = par
• सीमा = see-maa
• रेखा = ray-khaa
• है = hai

A natural rhythm would be:

koṛṭ par sīmā rekhā hai

Usually, पर is better in this sentence.

Why?

Because a boundary line is drawn on the court surface, not inside it in the sense that में usually suggests.

So:

• कोर्ट पर सीमा रेखा है। = natural
• कोर्ट में सीमा रेखा है। = possible in some contexts, but less precise here

If you are talking about physical placement on a surface, पर is the safer and more natural choice.