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The definition of a challenge is an act of rebellion against someone or something. An example of challenge is an employee questioning the actions of their supervisor in a meeting. A challenge is defined as a demand for proof or an invitation to participate in a competition. An example of challenge is a guard asking for identification.
Example Sentences for challenging. All progress is initiated by challenging current concepts, and executed by supplanting existing institutions. There are those who have put themselves to the pains of challenging this statement of mine. The forces of vice, evil, and disease are challenging us to marshal our strength and give them battle. She was addressing them directly to him, and her uplifted finger was challenging him.