मेरी दोस्त आज बिज़ी है।

मेरी agrees with दोस्त here in the sense of female friend.

In Hindi, words like मेरा / मेरी / मेरे change to match the gender and number of the noun they describe.

• मेरा दोस्त = my male friend
• मेरी दोस्त = my female friend

So in this sentence, मेरी दोस्त tells you the friend is female.

Yes, in this sentence दोस्त refers to a female friend, because of मेरी.

A useful thing to know is that दोस्त often keeps the same form whether the friend is male or female. The surrounding words tell you the gender:

• मेरा दोस्त = my male friend
• मेरी दोस्त = my female friend

So the noun दोस्त does not change, but the possessive word does.

Because बिज़ी is a borrowed word from English, and in everyday Hindi it usually stays the same regardless of gender.

So you can say:

• मेरा दोस्त बिज़ी है।
• मेरी दोस्त बिज़ी है।

In both cases, बिज़ी stays बिज़ी.

This is different from many native Hindi adjectives, which often change form. For example:

• मेरा दोस्त व्यस्त है।
• मेरी दोस्त व्यस्त है।

Here व्यस्त also stays the same, but some other Hindi adjectives do change depending on gender.

आज means today.

So:

• मेरी दोस्त बिज़ी है। = My friend is busy.
• मेरी दोस्त आज बिज़ी है। = My friend is busy today.

It adds the time idea.

Yes. Hindi word order is flexible, although some orders sound more natural than others.

These are all understandable:

• मेरी दोस्त आज बिज़ी है।
• आज मेरी दोस्त बिज़ी है।
• मेरी दोस्त बिज़ी है आज।

The most neutral and common version here is मेरी दोस्त आज बिज़ी है।

है means is, and Hindi usually places the verb at the end of the sentence.

So the structure is roughly:

• मेरी दोस्त = my friend
• आज = today
• बिज़ी = busy
• है = is

Literal order: My friend today busy is.

Natural English: My friend is busy today.

Usually, in a full standard sentence like this, no.

You normally say:

• मेरी दोस्त आज बिज़ी है।

Leaving out है can sound incomplete, unless you are speaking very casually, using headlines, notes, or short chat-style language.

So for learners, it is best to keep है.

It is very common in modern spoken Hindi, especially in everyday conversation. It comes from English busy, but Hindi speakers use it naturally.

A more traditional or formal Hindi word is व्यस्त.

So both are possible:

• मेरी दोस्त आज बिज़ी है। = casual, everyday
• मेरी दोस्त आज व्यस्त है। = more formal or bookish

You would usually say:

• मेरा दोस्त आज बिज़ी है।

The main change is मेरी → मेरा.

So:

• मेरी दोस्त = my female friend
• मेरा दोस्त = my male friend

Not by itself. मेरी दोस्त normally just means my female friend.

If you wanted to clearly say girlfriend in the romantic sense, people might say:

• मेरी गर्लफ्रेंड
• or use context to make it clear

So मेरी दोस्त is usually just my friend.

It is pronounced roughly like biz-zee, very close to the English word busy, but said in a Hindi accent.

The spelling बिज़ी shows:

• बि = bi
• ज़ = z
• ी = long ee

So: bi-zee.

It is neutral and very natural in everyday speech.

• मेरी दोस्त आज बिज़ी है। sounds conversational and common.
• If you want something more formal, you might say मेरी मित्र आज व्यस्त है, but that sounds much less casual and not as common in normal conversation.

So for real-life spoken Hindi, this sentence is perfectly normal.