- (n.) A railway sleeper lying parallel with the rail.
- (a.) Extending in length; in the direction of the length; running lengthwise, as distinguished from transverse; as, the longitudinal diameter of a body.
- (a.) Of or pertaining to longitude or length; as, longitudinal distance.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). longitudinal. Retrieved September 21, 2026, from http://smartdefine.org/longitudinal/definitions/2028784 |
| Chicago | Webster's. 2011. "longitudinal" http://smartdefine.org/longitudinal/definitions/2028784 (accessed September 21, 2026). |
| Harvard | Webster's 2011, longitudinal, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/longitudinal/definitions/2028784>. |
| MLA | Webster's. "longitudinal" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/longitudinal/definitions/2028784> |