Meaning: every corner of a room/ place.
Example: Susan said, “Dad has become so absent minded these days. Yesterday, we spent over an hour looking for his glasses. We searched every nook and corner of the house and finally decided to give up. And can you guess where it was?”
Susan’s mother replied, “Yes. It must have been in his pocket all the while. This is something that happens regularly. I have become equally absent minded. I suppose it happens with age.”
Susan wondered how she could help them.