1. noun /keɪs/
For a change, in this case, he was telling the truth.
It is not the case that every unfamiliar phrase is an idiom.
2. adjective /keɪs/
The last remaining card of a particular rank
He drew the case eight!
3. verb /keɪs/
You are in the grounds of Brockholes Abbey, a house into which a great deal of valuable property has just been moved. And your job is to case the joint for a break in.
Wikipedia foundation.