'Challenging' definitions:

Definition of 'challenging'

(from WordNet)
adjective
Requiring full use of your abilities or resources; "ambitious schedule"; "performed the most challenging task without a mistake" [syn: ambitious, challenging]
adjective
Stimulating interest or thought; "a challenging hypothesis"; "a thought-provoking book" [syn: challenging, thought- provoking]
adjective
Disturbingly provocative; "an intriguing smile" [syn: challenging, intriguing]

Definition of 'Challenging'

From: GCIDE
  • Challenge \Chal"lenge\, v. t. [imp. & p. p. Challenged; p. pr. & vb. n. Challenging.] [OE. chalengen to accuse, claim, OF. chalengier, chalongier, to claim, accuse, dispute, fr. L. calumniar to attack with false accusations. See Challenge, n., and cf. Calumniate.]
  • 1. To call to a contest of any kind; to call to answer; to defy. [1913 Webster]
  • I challenge any man to make any pretense to power by right of fatherhood. --Locke. [1913 Webster]
  • 2. To call, invite, or summon to answer for an offense by personal combat. [1913 Webster]
  • By this I challenge him to single fight. --Shak. [1913 Webster]
  • 3. To claim as due; to demand as a right. [1913 Webster]
  • Challenge better terms. --Addison. [1913 Webster]
  • 4. To censure; to blame. [Obs.] [1913 Webster]
  • He complained of the emperors . . . and challenged them for that he had no greater revenues . . . from them. --Holland. [1913 Webster]
  • 5. (Mil.) To question or demand the countersign from (one who attempts to pass the lines); as, the sentinel challenged us, with "Who comes there?" [1913 Webster]
  • 6. To take exception to; question; as, to challenge the accuracy of a statement or of a quotation. [1913 Webster]
  • 7. (Law) To object to or take exception to, as to a juror, or member of a court. [1913 Webster]
  • 8. To object to the reception of the vote of, as on the ground that the person in not qualified as a voter. [U. S.] [1913 Webster]
  • To challenge to the array, favor, polls. See under Challenge, n. [1913 Webster]

Definition of 'challenging'

From: GCIDE
  • challenging \challenging\ adj.
  • 1. requiring full use of one's abilities or resources; as, challenging task.
  • Syn: ambitious, demanding. [WordNet 1.5]
  • 2. disposed to or engaged in defiance of established authority.
  • Syn: insubordinate, resistant, resistive. [WordNet 1.5]

Synonyms of 'challenging'

From: Moby Thesaurus

Words containing 'Challenging'