The meaning of CAN is be physically or mentally able to. How to use can in a sentence. May: Usage Guide CAN definition: 1. used to say that you can and will do something: 3. used to say that you…. CAN definition: to be able to; have the ability, power, or skill to. See examples of can used in a sentence. used as an auxiliary to indicate ability, skill, or fitness to perform a task 2. used as an auxiliary to indicate.... Click for more definitions. Definition of can1 modal verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. can synonyms, can pronunciation, can translation, English dictionary definition of can. to be able to, have the power or skill to: I can take a bus to the airport. She can paint very well.