Konsertantrekket er svart.

Because Norwegian usually writes compound nouns as a single word.

Here, konsertantrekket is built from:

• konsert = concert
• antrekk = outfit
• -et = the definite ending for a neuter noun

So the structure is basically:

konsert + antrekk + et → konsertantrekket

English often uses two words, like concert outfit, but Norwegian normally joins them into one compound noun.

The ending -et marks the noun as definite singular.

The base noun is:

• et antrekk = an outfit

Its definite form is:

• antrekket = the outfit

When that noun is part of a compound, the definite ending still goes on the end of the whole word:

• et konsertantrekk = a concert outfit
• konsertantrekket = the concert outfit

Because in Norwegian, the is often built into the noun as an ending.

So instead of a separate word before the noun, Norwegian commonly does this:

• et antrekk = an outfit
• antrekket = the outfit

That is why konsertantrekket already means the concert outfit.

A separate word such as det is used in some other situations, especially when an adjective comes before the noun:

• det svarte konsertantrekket = the black concert outfit

But in your sentence, there is no adjective before the noun, so konsertantrekket by itself is enough.

Because svart is a predicative adjective here, meaning it comes after er and describes the subject.

In Norwegian, adjectives behave differently depending on where they appear:

• before the noun: det svarte konsertantrekket
• after a verb like er: konsertantrekket er svart

So even though the noun is definite, you do not use the definite -e form after er.

A useful contrast is:

• det svarte konsertantrekket = the black concert outfit
• konsertantrekket er svart = the concert outfit is black

Yes. Antrekk is a neuter noun.

You can see that from its indefinite form:

• et antrekk

This matters because neuter nouns take the definite singular ending -et:

• et antrekk → antrekket

It also matters for adjective agreement in some contexts. With many adjectives, the neuter form adds -t:

• en stor bil = a big car
• et stort hus = a big house

With svart, the form already ends in -t, so it looks the same as the form you would expect here.

No. In Bokmål, you may also see sort.

Both are used, and both can mean black. In everyday Norwegian, svart is very common and sounds completely natural here:

• Konsertantrekket er svart.

You might also encounter:

• Konsertantrekket er sort.

As a learner, it is good to recognize both forms. If you use svart, you will be understood perfectly.

The sentence follows the normal Norwegian pattern:

• subject
  • verb
    • complement

So:

• Konsertantrekket = subject
• er = verb
• svart = adjective describing the subject

This is the standard order for a simple statement.

If you turn it into a yes/no question, the verb comes first:

• Er konsertantrekket svart? = Is the concert outfit black?

You would use the indefinite form:

• Et konsertantrekk er svart.

Compare:

• Et konsertantrekk = a concert outfit
• Konsertantrekket = the concert outfit

So the difference is just the noun form:

• Et konsertantrekk er svart. = A concert outfit is black.
• Konsertantrekket er svart. = The concert outfit is black.

In the plural, both the noun and the adjective change:

• Konsertantrekkene er svarte. = The concert outfits are black.

Here:

• konsertantrekkene = the concert outfits
• svarte = black, plural form

So you can compare:

• Konsertantrekket er svart. = The concert outfit is black.
• Konsertantrekkene er svarte. = The concert outfits are black.