- (v.i.) To pursue a course of investigation and study; to make investigation.
- (v.t.) 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; as, to investigate the causes of natural phenomena.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). investigate. Retrieved September 25, 2026, from http://smartdefine.org/investigate/definitions/2023448 |
| Chicago | Webster's. 2011. "investigate" http://smartdefine.org/investigate/definitions/2023448 (accessed September 25, 2026). |
| Harvard | Webster's 2011, investigate, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/investigate/definitions/2023448>. |
| MLA | Webster's. "investigate" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/investigate/definitions/2023448> |