challange
US
・UK
A1
noun
- A call to someone to participate in a competitive situation or fight to decide who is superior in terms of ability or strength.
- A call to prove or justify something.
- Exposure of the immune system to pathogenic organisms or antigens.
verb
- Dispute the truth or validity of.
- Invite (someone) to engage in a contest.
- Expose (the immune system) to pathogenic organisms or antigens.