Definition of isobar
1 : an imaginary line or a line on a map or chart connecting or marking places of equal barometric pressure
2 : one of two or more atoms or elements having the same atomic weights or mass numbers but different atomic numbers
Recent Examples of isobar from the Web
Dear Tom, What determines how isobars are drawn on weather maps?
Isobars help the meteorologist locate frontal boundaries because fronts are located in troughs of low pressure.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'isobar'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
ISOBAR Defined for Kids
Definition of isobar for Students
: a line on a map to indicate areas having the same atmospheric pressure
Medical Definition of isobar
: one of two or more atoms or elements having the same atomic weights or mass numbers but different atomic numbers
Seen and Heard
What made you want to look up isobar? Please tell us where you read or heard it (including the quote, if possible).