read between the lines
Perceive or detect a hidden meaning, as in They say that everything's fine, but reading between the lines I suspect they have some marital problems. This term comes from cryptography, where in one code reading every second line of a message gives a different meaning from that of the entire text. [Mid-1800s]
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.