Definition of pat adverb from the Oxford Advanced American Dictionary

 

pat

 adverb
adverb
NAmE//pæt//
 
 
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Idioms
have/know something down pat
 
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to know something perfectly so that you can repeat it at any time without having to think about it He had all the answers down pat.
to refuse to change your mind about a decision you have made or an opinion you have
See the Oxford Advanced Learner's Dictionary entry: pat