noun
case
B1
Meanings: 'case' or 'instance' (e.g., legal case, hypothetical). Noun: der Fall. Plural is Fälle (note umlaut change), irregular plural. Declines as der Fall / des Falls / dem Fall / die Fälle. Common collocations: im Fall (in case), im schlimmsten Fall (in the worst case).
Examples
In diesem Fall kann ich Ihnen leider nicht helfen.
I'm afraid I can't help you in this case.
In diesem Fall können wir helfen.
In this case we can help.
Im schlimmsten Fall würden die Mitarbeiter evakuiert, wenn der Brand sich ausbreitete.
In the worst case, the employees would be evacuated if the fire spread.
Details
Mnemonics
sounds like English 'fall' — imagine a falling event to remember an instance
der (masculine) — remember 'der Fall' like 'the fall (event)' which is often described as masculine
Notes
Has multiple meanings (case, instance, fall); as a noun it is capitalized. Context determines whether it means 'case', 'fall (accident)', or other senses.