(New American Roget's College Thesaurus)
adj. official, decisive; imperative, peremptory; truthful, reliable; scholarly. See authority, certainty.Ant., doubtful.
(Roget's IV) modif.
1. [Based on competent authority]
Syn. well-supported, well-documented, scholarly, reliable, trustworthy, authentic, Dependable, definitive, sound; see also sense 2, official 3 .
2. [Having authority]
Syn. official, executive, imperial, administrative, supreme, ex cathedra (Latin), dominant, lawful, legal, mandatory, impressive, imposing, orthodox, ruling, sovereign, having due authority, weighty, having the weight of authority, entitled to obedience, decisive, worthy of acceptance, canonical, valid, standard, authorized; see also administrative , approved , governing , reigning .
Ant. unauthorized, illegal*, questionable.
3. [Suggestive of authority]
Syn. dogmatic, officious, domineering; see absolute 3 , autocratic 1 .
(Roget's 3 Superthesaurus) a.
official, validated, authentic, true, genuine, documented, sound, certified, reliable, trustworthy, scholarly.
ANT.: questionable, frivolous, unsubstantiated
(Roget's Thesaurus II) adjective 1. Having or arising from authority: conclusive, official, sanctioned, standard. See TRUE. 2. Worthy of belief, as because of precision or faithfulness to an original: authentic, convincing, credible, faithful, true, trustworthy, valid. See TRUE. 3. Serving the function of deciding or settling with finality: conclusive, decisive, definitive, determinative, final. See DECIDE. 4. Exercising authority: commanding, dominant, lordly, masterful. See OVER, STRONG.

English dictionary for students. 2013.

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  • authoritative — [ə thôr′ə tāt΄iv, əthär′ə tāt΄iv; ] also [, ə thôr′ə tə tiv΄, ə thär′ə tə tiv΄] adj. [ML auctoritativus] 1. having or showing authority; official 2. based on competent authority; reliable because coming from one who is an expert or properly… …   English World dictionary

  • authoritative — index arbitrary and capricious, assertive, authentic, categorical, certain (positive), clear (certain) …   Law dictionary

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  • authoritative — authoritarian, authoritative These two words should be carefully distinguished as their implications are quite different. Authoritarian is generally used of people or their actions and has the unfavourable meaning ‘favouring or encouraging strict …   Modern English usage

  • authoritative — authoritatively, adv. authoritativeness, n. /euh thawr i tay tiv, euh thor /, adj. 1. having due authority; having the sanction or weight of authority: an authoritative opinion. 2. substantiated or supported by documentary evidence and accepted… …   Universalium

  • authoritative — au|thor|i|ta|tive [o:ˈθɔrıtətıv, ə US əˈθa:rəteıtıv, əˈθo: ] adj 1.) an authoritative book, account etc is respected because the person who wrote it knows a lot about the subject ▪ the most authoritative work on English surnames 2.) behaving or… …   Dictionary of contemporary English

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