To know what a person is saying by watching how their lips move.(verb)
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Use "lipread" in a sentence
"I told her the word would never have any meaning for her because she was sitting up on a butte with binoculars, watching people talk from a distance and even if she could lipread, she'd be getting it wrong."
"Personally I prefer signs when I have the chance, lipread when I have to, and use writing as a back up."
"Bland in demeanor to me means not being able to lipread a single word."