read someone's lips
Definition from Wiktionary, the free dictionary
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- To discern what someone is saying by watching the shape of the mouth rather than by hearing the sounds of the words.
- Deaf people may be able to read people's lips, but it's not a foolproof means of communication.
- (idiomatic) To pay close attention (often imperative).
- Read my lips. We are not going to the park today, and that is final.