#1
challenge v. [
dispute, gainsay] take exception to; "She challenged his claims"
. wn #2
challenge v. issue a challenge to; "Fischer challenged Spassky to a match"
. wn #3
challenge n. a demanding or stimulating situation; "they reacted irrationally to the challenge of Russian power"
. wn #4
challenge n. a call to engage in a contest or fight
. wn #5
challenge n. questioning a statement and demanding an explanation; "his challenge of the assumption that Japan is still our enemy"
. wn