יש לנו פגישה חשובה מחר בבוקר.

In Hebrew, possession in the present tense is usually expressed with:

יש + ל־ + person

So יש לנו literally means something like there is to us, but the natural English meaning is we have.

A few examples:

• יש לי = I have
• יש לך = you have
• יש לו = he has
• יש לנו = we have

So יש לנו פגישה means we have a meeting.

לנו means to us or for us.

It is made from the preposition ל־ (to/for) plus the pronoun ending for we/us.

In a possession structure with יש, it gives the meaning we have:

• יש לנו זמן = we have time
• יש לנו שאלה = we have a question

So in this sentence, לנו is the part that tells you who has the meeting.

Hebrew does not have an indefinite article. There is no separate word for a or an.

So:

• פגישה can mean a meeting or just meeting, depending on context.
• If you want the meeting, Hebrew uses the definite article ה־:
  • הפגישה = the meeting

That means:

• יש לנו פגישה = we have a meeting
• יש לנו הפגישה would be wrong

If the noun is definite, you would normally say something like יש לנו את הפגישה, depending on the sentence.

In Hebrew, adjectives normally come after the noun they describe.

So:

• פגישה חשובה = an important meeting
• literally: meeting important

This is the normal word order in Hebrew.

Compare:

• ספר מעניין = an interesting book
• ילד חכם = a smart boy
• מכונית חדשה = a new car

So פגישה חשובה is exactly what you should expect in Hebrew.

Because פגישה is a feminine singular noun, and Hebrew adjectives must agree with the noun in:

• gender
• number
• definiteness

Since פגישה is feminine singular, the adjective also has to be feminine singular:

• פגישה חשובה = important meeting
• not פגישה חשוב

Compare:

• ספר חשוב = important book
• פגישה חשובה = important meeting
• פגישות חשובות = important meetings

So the ־ה ending on חשובה matches the feminine noun פגישה.

A very common clue is the ending ־ה. Many Hebrew nouns ending in ־ה are feminine, and פגישה is one of them.

You can also see it from adjective agreement:

• פגישה חשובה

Since the adjective is feminine, that confirms the noun is feminine too.

That said, the ־ה ending is only a helpful pattern, not a perfect rule. Some nouns do not follow it, so learners still need to memorize gender as part of the word.

מחר בבוקר is the normal way to say tomorrow morning.

It is made of:

• מחר = tomorrow
• בבוקר = in the morning

Together, they function like one time phrase: tomorrow morning.

This order is the most natural one in Hebrew.
A version like בבוקר מחר would sound unnatural in ordinary speech.

So:

• מחר בבוקר = tomorrow morning
• מחר בערב = tomorrow evening
• מחר בלילה = tomorrow at night / tomorrow night

Because the word בוקר already begins with ב, and Hebrew adds the preposition ב־ (in/at) directly to the front of the word.

So:

• ב־ = in
• בוקר = morning
• בבוקר = in the morning

It looks like a doubled ב, but it is really just:

ב + בוקר

The same thing happens in other words too when a prefix is added to a word that already starts with the same letter.

Because Hebrew, like English, often uses a present-style structure for planned future events.

In English, you naturally say:

• We have an important meeting tomorrow morning

not necessarily:

• We will have an important meeting tomorrow morning

Hebrew works similarly here:

• יש לנו פגישה חשובה מחר בבוקר = very natural for a scheduled future event

So even though יש is the normal present-tense possession structure, the word מחר makes the time frame clearly future.

A common pronunciation is:

yesh LA-nu pgi-SHA kha-shu-VA ma-KHAR ba-BO-ker

Stress is usually on the last syllable in these words:

• לָנוּ → LA-nu
• פְּגִישָׁה → pgi-SHA
• חֲשׁוּבָה → kha-shu-VA
• מָחָר → ma-KHAR
• בַּבּוֹקֶר / בבוקר → ba-BO-ker

A rough full pronunciation:

yesh LA-nu pgi-SHA kha-shu-VA ma-KHAR ba-BO-ker

Then both the noun and the adjective would usually become definite.

So:

• פגישה חשובה = an important meeting
• הפגישה החשובה = the important meeting

This is an important Hebrew pattern: if a noun is definite, its adjective is also definite.

Compare:

• ספר מעניין = an interesting book
• הספר המעניין = the interesting book

So in your sentence, פגישה חשובה is indefinite: an important meeting.