say it: CHAL-uhnj
challenge is a noun and verb meaning "a demanding or stimulating situation". It carries 9 recorded senses.
a demanding or stimulating situation
“they reacted irrationally to the challenge of Russian power”
a call to engage in a contest or fight
questioning a statement and demanding an explanation
“his challenge of the assumption that Japan is still our enemy”
a formal objection to the selection of a particular person as a juror
a demand by a sentry for a password or identification
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for challenge come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.