Synonym: exceptional, extraordinary, unduplicated. Similar words: recent, recently, talented, president, presidential, concede, receive, receiver. Meaning: [ʌnˈpresɪdentɪd] 
adj. having no precedent; novel.
adj. having no precedent; novel. 
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181. The ONS, which is charged with collecting data and providing impartial analysis, said that it made the unprecedented release because of the "topicality of the issue".
182. Former business secretary John Hutton said the scale and depth of the economic conditions Britain was facing were "unprecedented".
183. And it is to be hoped that the normal balance of executive and legislative authority may be wholly equal, wholly adequate to meet the unprecedented task before us.
184. During the special session, it was quickly apparent that expectations for country offices have risen to unprecedented heights.
More similar words: recent, recently, talented, president, presidential, concede, receive, receiver, reception, recession, entertainment, precise, integrated, precisely, decent, presidency, interpret, appreciation, evident, student, incident, identity, resident, identify, center, intent, interpretation, recipient, confident, dependent.