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a. A call to engage in a contest, fight, or competition: a challenge to a duel.
b. An act or statement of defiance; a call to confrontation: a challenge to the government's authority.
2. A demand for explanation or justification; a calling into question: a challenge to a theory.
3. A sentry's call to an unknown party for proper identification.
4. A test of one's abilities or resources in a demanding but stimulating undertaking: a career that offers a challenge.
5. A claim that a vote is invalid or that a voter is unqualified.
6. Law
a. A formal objection to the inclusion of a prospective juror in a jury.
b. A legal case testing the validity of an action taken, particularly by the government.
7. Immunology The induction or evaluation of an immune response in an organism by administration of a specific antigen to which it has been sensitized.
v. chal·lenged, chal·leng·ing, chal·leng·es
a. To call to engage in a contest, fight, or competition: challenged me to a game of chess.
b. To invite with defiance; dare: challenged him to contradict her.
c. To confront or struggle with (something) as a test of one's abilities: rafters challenging the rapids.
2. To take exception to; call into question; dispute: a book that challenges established beliefs.
3. To order to halt and be identified, as by a sentry.
4. Law
a. To take formal objection to (a prospective juror).
b. To bring a legal case testing the validity of an action, particularly by the government.
5. To question the qualifications of (a voter) or the validity of (a vote).
6. To have due claim to; call for: events that challenge our attention.
7. To summon to action, effort, or use; stimulate: a problem that challenges the imagination.
8. Immunology To induce or evaluate an immune response in (an organism) by administering a specific antigen to which it has been sensitized.
1. To make or give voice to a challenge.
2. To begin barking upon picking up the scent. Used of hunting dogs.

[Middle English chalenge, from Old French, from Latin calumnia, trickery, false accusation; see calumny. V., Middle English chalengen, from Old French chalangier, from Latin calumniārī, from calumnia.]

chal′lenge·a·ble adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.challengeable - capable of being challenged
contestable - capable of being contested


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We have advised our clients that any decision by the council to approve the RMA would be readily challengeable by way of an application for judicial review.
He pointed out that keeping in view the present critical and Challengeable condition of the country; they tried their best to construct the New Mardan Jail building equipped not only with all modern facilities but also a foolproof secured prison.
The life of the current government, the civil society activist said, was extended by the national legislature whose period had also elapsed, adding that from the legal and constitutional point of view, it was not right that another legally challengeable institution extended the term of another legally challengeable institution.
Also, as Mauritius becomes more engaged with the world, there is the notion that the rules by which we previously lived are challengeable.
Philadelphia Eagles owner Jeffrey Lurie was disappointed the Patriots' proposal that virtually anything be challengeable was not passed.
The proposers were given no warning of a problem and no explanation subsequently, although I suspect the decision was based on a rather conservative challengeable interpretation of "predetermination" which relates to the planning process, although now only a small number of councillors are involved in each authority.
In near future exactly implementation of common framework of national digitized spatial data infrastructure (compliance with requirements of INSPIRE directive and implementation of GIS solutions particularly in spatial planning) will be challengeable also for heritage protection sphere due to large number collected, but not standardized and published yet information, which is important and widely used in spatial planning, construction process, estimation of property value, arts industry and science, general education, property management, avoiding of failure of property markets, etc.
But always to keep all advantages of PA6 and to reduce the effect of different compositions while keeping away from the disadvantage of virgin PA6 is challengeable base on requirements.
Even if judicial review is ultimately available, private parties must slog through whatever process the agency has adopted before it reaches a final judgment challengeable in court.
Features Data Classification Training data & Pre trained and fixed Distribution Center Class Labels Predictable Model revision Rare Arrival of Test data Bounded Environment Bounded storage Concept Drift Not applicable Algorithms Batch mode algorithms Visualization of result Feasible Forgetting Mechanism Not applicable Features Data Stream Classification Training data & Changeable and Distribution Center evolve over time Class Labels Unpredictable Model revision Most common and frequent Arrival of Test data unbounded and speedy Environment Resource aware environment Concept Drift Applicable Algorithms Incremental or online algorithms Visualization of result Highly challengeable Forgetting Mechanism Applicable