Meaning: Describes something that seems very pleasant or attractive at first but eventually reveals itself as horrible.
Meaning: melancholy mood accompanied by deep thought
Example: I realised that Sandra wasn't concentrating on what the boss was saying and had disappeared into a brown study. Read on
Meaning: an impossibility
Example: His plans of becoming an astronaut are a pipe dream, he should be more realistic. Read on
Meaning: a situation beyond the scope of one's imagination
Example: Never in my wildest dreams did I think she'd abandon her father. Read on