- (a.) Not according to law; not regular or authorized; unlawful; improper.
- (v.t.) To render illegitimate; to declare or prove to be born out of wedlock; to bastardize; to illegitimatize.
- (a.) Not authorized by good usage; not genuine; spurious; as, an illegitimate word.
- (a.) Not legitimately deduced or inferred; illogical; as, an illegitimate inference.
- (a.) Unlawfully begotten; born out of wedlock; bastard; as, an illegitimate child.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Illegitimate. Retrieved September 23, 2026, from http://smartdefine.org/illegitimate/definitions/2018953 |
| Chicago | Webster's. 2011. "Illegitimate" http://smartdefine.org/illegitimate/definitions/2018953 (accessed September 23, 2026). |
| Harvard | Webster's 2011, Illegitimate, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/illegitimate/definitions/2018953>. |
| MLA | Webster's. "Illegitimate" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/illegitimate/definitions/2018953> |