challenge?
1 invite (someone) to engage in a contest : he challenged one of my men to a duel. • enter into competition with or opposition against : incumbent Democrats are being challenged in the 29th district. • make a rival claim to or threaten someone's hold on (a position) : they were challenging his leadership. • [ trans. ] invite (someone) to do something that one thinks will be difficult or impossible; dare : I challenged them to make up their own minds. • [usu. as adj. ] ( challenging) test the abilities of : challenging and rewarding employment. 2 dispute the truth or validity of : employees challenged the company's requirement. • Law object to (a jury member). • (of a sentry) call on (someone) for proof of identity. 3 Medicine expose (the immune system) to pathogenic organisms or antigens. |
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