n.

1. The act or process of investigating.
2. A detailed inquiry or systematic examination. See synonyms at inquiry.

investigational in·ves'ti·ga'tion·al adj.

noun

1. The act or an instance of exploring or investigating: exploration, probe, reconnaissance. See investigate.
2. A seeking of knowledge, data, or the truth about something: inquest, inquiry, inquisition, probe, research. See investigate.
3. A close or systematic study: analysis, examination, inspection, review, survey. See investigate.

n. a duly authorized, systematized, detailed examination or inquiry to uncover facts and determine the truth of a matter. This may include collecting, processing, reporting, storing, recording, analyzing, evaluating, producing, and disseminating the authorized information.

See the Introduction, Abbreviations and Pronunciation for further details.

Note: click on a word meaning below to see its connections and related words.

The noun has 2 meanings:

Meaning #1: an inquiry into unfamiliar or questionable activities
  Synonym: probe

Meaning #2: the work of inquiring into something thoroughly and systematically
  Synonym: investigating

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Dansk (Danish)
n. - undersøgelse, efterforskning, udforskning

idioms:

• Criminal Investigation Department    efterforskningsafdeling
• exploratory investigation    undersøgende undersøgelse
• preliminary investigation    foreløbig undersøgelse

Nederlands (Dutch)
onderzoek voorlopig onderzoek vooronderzoek

Français (French)
n. - enquête, investigation, (Comm, Méd, Sci) étude, (Jur) vérification (comptabilité)

idioms:

• Criminal Investigation Department    (GB) la police judiciaire, la PJ
• exploratory investigation    enquête préparatoire
• preliminary investigation    instruction, enquête/investigations préalables ou préparatoires

Deutsch (German)
n. - Ermittlung, Untersuchung, (Nach)forschung

idioms:

• Criminal Investigation Department    Kriminalpolizei
• exploratory investigation    exploratorische Forschung
• preliminary investigation    Voruntersuchung

Ελληνική (Greek)
n. - έρευνα, εξέταση, ανάκριση, διενέργεια ή διεξαγωγή ανακρίσεων

idioms:

• Criminal Investigation Department    (Βρετ.) Γενική Ασφάλεια
• exploratory investigation    διερεύνηση
• preliminary investigation    προκαταρτική έρευνα

Italiano (Italian)
inchiesta, ricerca, indagine

idioms:

• Criminal Investigation Department    polizia giudiziaria
• exploratory investigation    ricerca esploratoria
• Federal Bureau of Investigation    Ufficio Federale di Investigazione
• preliminary investigation    inchiesta preliminare

Português (Portuguese)
n. - investigação (f)

idioms:

• Criminal Investigation Department    Departamento (m) de Investigação Criminal
• exploratory investigation    investigação (f) exploratória
• Federal Bureau of Investigation    (FBI) Agência (f) Federal de Investigações
• preliminary investigation    investigação (f) preliminar

Русский (Russian)
расследование, исследование

idioms:

• Criminal Investigation Department    Отдел Криминальных Расследований
• exploratory investigation    научные изыскания
• Federal Bureau of Investigation    Федеральное Бюро Расследований
• preliminary investigation    предварительное расследование

Español (Spanish)
n. - investigación, averiguación, estudio, encuesta, análisis

idioms:

• Criminal Investigation Department    Departamento de Investigación Criminal
• exploratory investigation    investigación exploratoria
• preliminary investigation    investigación preliminar

Svenska (Swedish)
n. - undersökning, (ut)forskning

中文（简体） (Chinese (Simplified))
调查, 研究

idioms:

• Criminal Investigation Department    刑事侦缉部
• exploratory investigation    探究的调查
• preliminary investigation    初步调查

中文（繁體） (Chinese (Traditional))
n. - 調查, 研究

idioms:

• Criminal Investigation Department    刑事偵緝部
• exploratory investigation    探究的調查
• preliminary investigation    初步調查

한국어 (Korean)
n. - 조사 , 연구, 연구논문

日本語 (Japanese)
n. - 調査, 研究, 研究論文, 検査

العربيه (Arabic)
‏(الاسم) تحقيق, بحث التحقيق الاستكشافي التحقيق أو البحث الأولي‏

עברית (Hebrew)
n. - ‮חקירה‬

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csi crime scene investigation fingerprint examination kit