from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To observe or inquire into in detail; examine systematically.
- intransitive v. To make a detailed inquiry or systematic examination.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To inquire into or study in order to ascertain facts or information.
- v. To examine, look into, or scrutinize in order to discover something hidden or secret.
- v. To conduct an inquiry or examination.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To follow up step by step by patient inquiry or observation; to trace or track mentally; to search into; to inquire and examine into with care and accuracy; to find out by careful inquisition.
- intransitive v. To pursue a course of investigation and study; to make investigation.
from The Century Dictionary and Cyclopedia
- To search into or search out; inquire into; search or examine into the particulars of; examine in detail: as, to investigate the forces of nature; to investigate the causes of natural phenomena; to investigate the conduct of an agent.
- Synonyms To scrutinize, overhaul, sift, probe into, explore, study.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. investigate scientifically
- v. conduct an inquiry or investigation of
Latin investīgāre, investīgāt- : in-, in; see in-2 + vestīgāre, to track (from vestīgium, footprint).(American Heritage® Dictionary of the English Language, Fourth Edition)
Recorded since circa 1510, a back-formation from investigation, from Latin investigatio "a searching into", from investigatus, the past participle of investigare, itself from in- "in(to)" + vestigare "to track, trace" (from vestigium "footprint, track", of unknown origin) (Wiktionary)