1. to understand more than is directly stated; to try to understand someone's real feelings or intentions from what they say or write

1. When Mr. Allen said he’d find a good part for me, I knew he meant I didn’t get the leading role. I can read between the lines.

2. Reading between the lines, I'd say he isn't happy with the situation.

3. She said she could afford it, but reading between the lines I don't think she has enough money.