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English definition of “understand”

understand

verb (KNOW)    /ˌʌn.dəˈstænd/ US  /-dɚ-/ (understood, understood)
A1 [I or T] to know the meaning of something that someone says: She explained the whole idea again, but I still didn't understand. Is there anyone here who understands Arabic ? I think he was phoning from a pub - it was so noisy I couldn't understand (= recognize ) a word he said.Understanding and comprehending A2 [I or T] to know why or how something happens or works : [+ question word] We still don't fully understand how the brain works .Understanding and comprehending B1 [I or T] to know how someone feels or why someone behaves in a particular way: My wife doesn't understand me. Sometimes I don't understand James. [+ question word] You don't understand what it's like/how it feels to have to beg on the streets .Sympathy and compassionEmpathy and sensitivitySympathy and compassion understand sb to mean sth to think , especially wrongly , that someone means a particular thing: When he said three o'clock, I understood him to mean in the afternoon .Understanding and comprehending understand one another/each other When two people understand one another, they both know what the other means and wants and they have an agreement : Both sides must try to understand one another, to recognize each other's rights and beliefs .Understanding and comprehending
(Definition of understand verb (KNOW) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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