As an exception to a rule, habit, or normal state; just this once.
example
Normalerweise trinke ich keinen Alkohol, aber heute stoße ich ausnahmsweise mit dir an.
Normally I don't drink alcohol, but today I'll make an exception and toast with you.
Usage tips
Word structure
The word is built logically: It consists of the noun 'die Ausnahme' (the exception), the linking -s, and the ending '-weise'. The ending '-weise' turns nouns into adverbs and means 'in the way/manner of ...'.
EXAMPLE
Normalerweise gehe ich früh schlafen, aber heute mache ich eine Ausnahme.
Normally I go to sleep early, but today I'm making an exception.
Sentence position
As an adverb, 'ausnahmsweise' (as an exception) can stand in different places in the sentence. If it is in position 1, the verb follows immediately. But it can also stand after the verb and the subject.
EXAMPLE
Ausnahmsweise dürfen die Kinder heute länger aufbleiben.
As an exception, the children may stay up longer today.
Usage pattern
With 'ausnahmsweise' (as an exception), you signal that you are consciously going against a rule or habit. It emphasizes that this is not the normal case and is meant to be a one-time thing.
EXAMPLE
Ich esse kein Fleisch, aber diese Suppe probiere ich ausnahmsweise.
I don't eat meat, but I'll try this soup as an exception.
Compare with
antonym
ausnahmsweise vs regelmäßig
regular
'regelmäßig' and 'ausnahmsweise' are opposites when talking about habits or repeated actions. 'regelmäßig' means that something happens again and again at similar intervals. 'ausnahmsweise' means that something is different from normal just this once. If something happens regularly, it is part of a habit or rule. If something happens 'ausnahmsweise' (as an exception), it is deviating from that habit or rule at that moment.
ausnahmsweise
Heute darf meine Schwester ausnahmsweise länger wach bleiben.
Today my sister is allowed to stay up longer as an exception.