Posa el got a l'armari de dalt.

Posa is the informal singular command form of the verb posar, which usually means to put, to place, or to set.

So:

• posar = to put
• posa! = put! / place!

In this sentence, Posa el got a l'armari de dalt, it is telling one person to do something.

A useful comparison:

• Tu poses = you put
• Posa! = put!

For -ar verbs, the tu command often looks like the he/she present form:

• parlar → Parla!
• mirar → Mira!
• posar → Posa!

El got means the glass.

Catalan normally uses the definite article very regularly, just like English does in the glass. If you are talking about a specific glass, el got is the natural form.

• got = glass
• el got = the glass

In this command, the speaker probably means a particular glass already understood from the context, so el got is expected.

Also note:

• got is a masculine noun
• so it takes el, not la

This is because armari begins with a vowel, and the article el becomes l' before a vowel.

So:

• el armari → l'armari

And the sentence has the preposition a before it:

• a + l'armari = a l'armari

This is the normal written form.

Compare:

• a l'armari = to/in the cupboard
• al calaix = to/in the drawer

Why al in the second example? Because:

• a + el = al before a consonant
• but before a vowel, you get a l'...

So:

• a + el llibre → al llibre
• a + l'armari stays a l'armari

Here it means something like in the cupboard or into the cupboard, even though Catalan uses a.

With verbs of placement such as posar, Catalan often uses a where English might use in, into, on, or to, depending on the context.

So in this sentence:

• Posa el got a l'armari
  = Put the glass in the cupboard

This is normal Catalan usage. You should not translate a too mechanically as only to.

Armari is a masculine noun meaning cupboard, cabinet, closet, or wardrobe, depending on context.

Its meaning can shift a bit depending on what kind of object is being talked about.

Examples:

• armari de cuina = kitchen cupboard/cabinet
• armari de roba = wardrobe
• armari in a general household context = cupboard or closet

In your sentence, since we are putting a glass there, cupboard or cabinet is probably the best interpretation.

De dalt literally means from above or of above, but in everyday use it often means:

• upper
• top
• upstairs, depending on context

In l'armari de dalt, it means the upper cupboard or the cupboard above.

So:

• l'armari de dalt = the top cupboard / the upper cupboard

This is a very common Catalan way to identify something by its position.

Compare:

• el calaix de baix = the bottom drawer
• la prestatgeria de dalt = the top shelf
• el pis de dalt = the flat upstairs / the floor above

It means in the upper cupboard, not on top of the cupboard.

This is a very important distinction.

• a l'armari de dalt = in/to the upper cupboard
• a dalt de l'armari = on top of the cupboard

So the word order changes the meaning:

1. l'armari de dalt
   = the cupboard that is up high / the upper cupboard

2. a dalt de l'armari
   = on top of the cupboard

That is a very common thing learners mix up.

Because de dalt is the normal fixed expression when describing something as the one above or the upper one.

Examples:

• la porta de dalt = the upper door
• el calaix de dalt = the top drawer
• l'armari de dalt = the upper cupboard

By itself, dalt often means up, above, or upstairs, but after a noun Catalan usually uses de dalt to mean the upper ...

So:

• de dalt = upper / above
• de baix = lower / below

It is informal singular, addressed to one person you would say tu to.

• Posa... = informal singular command

If you wanted a more formal version, you would say:

• Posi el got a l'armari de dalt.

If you were talking to more than one person:

• Poseu el got a l'armari de dalt.

So the sentence you have is the everyday you (singular, informal) command.

Yes. Posa can also be the third-person singular present form of posar:

• ell/ella posa = he/she puts

So out of context, posa can mean either:

• put! (command to tu)
• he/she puts

In your sentence, because it starts the sentence and gives an instruction, it is understood as a command.

A simple learner-friendly pronunciation is roughly:

• l'armari ≈ lar-ma-ree

A few notes:

• the l' is attached closely to the next word
• the stress falls on -ma-: ar-MA-ri
• the final -ri is lighter than English ree, but that approximation is fine for learners

And the full phrase:

• a l'armari ≈ a lar-MA-ri

Usually no, not in normal standard usage.

Catalan generally does not drop the article here. If you mean the glass, you say:

• Posa el got...

Saying just Posa got... would sound wrong.

So this is one of those cases where Catalan is actually quite similar to English:

• Put the glass...
• Posa el got...

Yes, it is natural and idiomatic.

A speaker would readily understand:

• Posa el got a l'armari de dalt.

It sounds like an ordinary household instruction.

Depending on region or exact situation, someone might choose slightly different wording, but this sentence is perfectly normal.

For example, a speaker might also say something more specific if needed:

• Posa el got al prestatge de dalt. = Put the glass on the top shelf.
• Posa el got a l'armari de sobre. = Put the glass in the upper cupboard.
  (This depends more on regional preference.)

But your original sentence is absolutely fine.

The sentence breaks down like this:

• Posa = verb, imperative command
• el got = direct object
• a l'armari de dalt = place/location complement

So:

• Posa → what should be done
• el got → the thing being moved
• a l'armari de dalt → where it should be put

That is a very common Catalan sentence pattern:

• Verb + object + place

For example:

• Posa els llibres a la taula.
• Deixa la jaqueta a la cadira.
• Guarda els plats a l'armari.