- (n.) A line connecting or marking places upon the surface of the earth where height of the barometer reduced to sea level is the same either at a given time or for a certain period (mean height), as for a year; an isopiestic line.
- (n.) The quality or state of being equal in weight, especially in atmospheric pressure. Also, the theory, method or application of isobaric science.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). isobar. Retrieved September 23, 2026, from http://smartdefine.org/isobar/definitions/2023927 |
| Chicago | Webster's. 2011. "isobar" http://smartdefine.org/isobar/definitions/2023927 (accessed September 23, 2026). |
| Harvard | Webster's 2011, isobar, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/isobar/definitions/2023927>. |
| MLA | Webster's. "isobar" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/isobar/definitions/2023927> |