Used to add additional information or another argument. Synonyms are 'zudem' (in addition) or 'darüber hinaus' (furthermore).
example
Ich mag das Buch, weil es spannend ist; außerdem habe ich viel daraus gelernt.
I like the book because it's exciting; besides, I learned a lot from it.
Usage tips
Word structure
The word 'außerdem' is a compound of 'außer' (except/besides) and 'dem' (that). Literally, it means 'besides this thing,' which helps you remember its additive function.
EXAMPLE
Die Wohnung ist schön und groß, außerdem ist die Miete nicht zu hoch.
The apartment is nice and spacious; besides, the rent isn't too high.
Word order at the beginning
When 'außerdem' is at the beginning of a sentence (position 1), the conjugated verb follows directly after it (position 2). This word order is called inversion.
EXAMPLE
Ich habe keine Zeit. Außerdem bin ich sehr müde.
I don't have time. Besides, I'm very tired.
Word order in the middle
'Außerdem' can also appear later in the sentence, usually after the conjugated verb. In this case, the normal word order of the sentence does not change.
EXAMPLE
Wir gehen heute Abend ins Kino, und ich habe außerdem noch eine Überraschung für dich.
We're going to the movies tonight, and I also have another surprise for you.
Compare with
near_synonym · confusable
außerdem vs auch
also / even
'auch' and 'außerdem' both add something. 'auch' often stands directly next to the person, thing, or action that applies in addition. 'außerdem' tends to connect two pieces of information or arguments and often stands at the beginning of a new clause or sentence. They can be confused because both express 'something else in addition'. Practically speaking: with 'auch', you say who or what is also included. With 'außerdem', you mention another point.
außerdem
Am Montag treffen wir uns in der Schule; außerdem planen wir das Sommerfest.
On Monday, we are meeting at the school; besides, we are planning the summer festival.
auch
Frau Müller kauft heute auch Brot für die Pause.
Ms. Müller is also buying bread for the break today.