challenge 15:18 Aug 28
challenge (radar) / interrogation, ~ and reply [for authentification] / interrogation et réponse [authentification]
Comprehensive Dictionary of Engineering and Technology.
challenge (épreuve) contest, tournament; (throphée) throphy.
Collins/Robert French Concise Ditionary
challenge
1. to invite or summon (to do sth., esp. take part in a contest)
2. to call sth into question.
3. to make demands on, stimule; the job challeges his ingenuity.
4. to order (a person) to halt and be identified.
5. Law, to make formal objectio to (a juror or jury)
6. to lay claim to (attn., etc.)
7. to inject (an experimental animal immunizeid with a test substance) with disease microorganisms to test for immunity to the disease.
8. a call to engage in a fight, argument, or contest.
9. a questioning of a statement or fact.
10. a demanding or stimulating situuation, career, etc.
11. a demand by a sentry, etc., for identification or a password.
12. Law, a formal objection to a person selecftor to serve on a jury or to the whole body of jurors
WHSmith/Collins English Dictionary | 
