investigation

[in-ves-ti-gey-shuhn]
noun
1.
the act or process of investigating or the condition of being investigated.
2.
a searching inquiry for ascertaining facts; detailed or careful examination.

Origin:
1400–50; late Middle English investigacio(u)n < Latin investīgātiōn- (stem of investīgātiō). See investigate, -ion

investigational, adjective
preinvestigation, noun
reinvestigation, noun


1, 2. scrutiny, exploration. Investigation, examination, inquiry, research express the idea of an active effort to find out something. An investigation is a systematic, minute, and thorough attempt to learn the facts about something complex or hidden; it is often formal and official: an investigation of a bank failure. An examination is an orderly attempt to obtain information about or to make a test of something, often something presented for observation: a physical examination. An inquiry is an investigation made by asking questions rather than by inspection, or by study of available evidence: an inquiry into a proposed bond issue. Research is careful and sustained investigation.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
investigation (ɪnˌvɛstɪˈɡeɪʃən)
 
n
the act or process of investigating; a careful search or examination in order to discover facts, etc
 
investi'gational
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

investigation
1436, from L. investigationem (nom. investigatio) "a searching into," from investigatus, pp. of investigare, from in- "in" + vestigare "to track, trace," from vestigium "footprint, track" (see vestige). Investigate is c.1510 back-formation.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The investigation reportedly revolved around allegations.
Four years after the investigation began there have still been no convictions.
The investigation into the fatal accident led to major design changes for
  future launch vehicles.
Studying the genome of this lineage and comparing it with randomly selected
  bonobos might be a productive line of investigation.
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