- (v.t.) To bring to nothing; to prevent from attaining a purpose; to disappoint; to defeat; to baffle; as, to frustrate a plan, design or attempt; to frustrate the will or purpose.
- (v.t.) To make null; to nullifly; to render invalid or of no effect; as, to frustrate a conveyance or deed.
- (a.) Vain; ineffectual; useless; unprofitable; null; voil; nugatory; of no effect.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). frustrate. Retrieved September 24, 2026, from http://smartdefine.org/frustrate/definitions/2010493 |
| Chicago | Webster's. 2011. "frustrate" http://smartdefine.org/frustrate/definitions/2010493 (accessed September 24, 2026). |
| Harvard | Webster's 2011, frustrate, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/frustrate/definitions/2010493>. |
| MLA | Webster's. "frustrate" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/frustrate/definitions/2010493> |