Min mobil er lydløs under mødet.

Because mobil is a common gender noun in Danish: en mobil.

With singular possessives, Danish matches the grammatical gender of the noun:

• min
  • common gender noun
• mit
  • neuter noun
• mine
  • plural

So:

• min mobil = my mobile phone
• mit møde would be wrong, because møde is actually et møde, but here you are not saying my meeting anyway.

A useful comparison:

• min telefon
• mit ur
• mine bøger

In Danish, you normally do not use an article when a possessive already tells you whose thing it is.

So Danish says:

• min mobil = my phone

not something like:

• den min mobil

This is similar to English, where we also say my phone, not the my phone.

Here, mobil means mobile phone / cell phone.

In everyday Danish, mobil is very commonly used on its own, just like English speakers often say my phone instead of my mobile phone.

You may also hear:

• mobiltelefon = mobile phone
• telefon = phone

But mobil is very natural in this sentence.

Because lydløs is an adjective describing mobil, and mobil is a common gender singular noun.

When an adjective is used after er as a predicate adjective, it still agrees with the noun:

• common gender singular: lydløs
• neuter singular: lydløst
• plural: lydløse

So:

• Min mobil er lydløs.
• Mit ur er lydløst.
• Mine telefoner er lydløse.

Literally, lydløs means soundless / silent, but with a phone it usually means on silent or muted.

So in real-life usage, Min mobil er lydløs means something like:

• My phone is on silent
• My phone is muted

It is a very natural way to say that the phone will not ring or make sounds.

Under mødet means during the meeting or during the meeting in question.

Here, mødet is the definite form of et møde:

• et møde = a meeting
• mødet = the meeting

Using the definite form often makes sense when the situation is understood from context, such as a specific meeting you are attending.

Compare:

• under mødet = during the meeting
• under et møde = during a meeting

The second version is possible, but it is more general.

Because Danish usually adds the definite article as an ending on the noun.

Since møde is a neuter noun:

• indefinite singular: et møde
• definite singular: mødet

This is a very important Danish pattern:

• et hus → huset
• et brev → brevet
• et møde → mødet

For common gender nouns, the definite ending is usually -en:

• en bil → bilen

Yes. Under can mean both:

• under / below
• during

In Min mobil er lydløs under mødet, it means during.

Examples:

• Katten er under bordet. = The cat is under the table.
• Jeg sov under filmen. = I slept during the film.

So the meaning depends on context.

No, this is normal Danish main-clause word order:

• Min mobil = subject
• er = verb
• lydløs = complement
• under mødet = time expression

So the structure is basically:

Subject + verb + description + time phrase

Very straightforward.

If you moved the time phrase to the front, Danish would use inversion:

• Under mødet er min mobil lydløs.

That is also correct, but the original sentence is the more neutral version.

A rough guide is:

• lyd sounds somewhat like lüth / loodh depending on how closely you imitate Danish vowels
• løs has the Danish ø sound, which does not exist exactly in English

A rough English-friendly approximation of lydløs is:

LUUTH-løs

But that is only approximate.

A few pronunciation notes:

• y in Danish is a rounded front vowel, not like English y in my
• ø is also a rounded vowel, somewhat like the vowel in French deux or German schön
• d in lyd is often softer than an English d

If you want to sound natural, the vowels matter more than saying a strong English-style d.

A rough approximation is:

MØH-deth or MUR-thul depending on accent and how simplified the guide is.

More importantly:

• ø is the tricky Danish vowel
• the ending -et in Danish is often pronounced more lightly than an English speaker expects

So although it is spelled mødet, the pronunciation is smoother and less sharply separated than in English.

If you are learning pronunciation, it helps to think of Danish unstressed endings as often being reduced.

Yes, absolutely.

That means essentially the same thing:

• Min mobil er lydløs under mødet.
• Min telefon er lydløs under mødet.

Mobil sounds a bit more specifically like mobile phone, while telefon is more general, but in modern usage both are very natural.

Yes. It is fully natural and idiomatic.

A Danish speaker would easily understand it as:

• My phone is on silent during the meeting

It sounds like a normal everyday statement, especially in work, school, or formal situations.