jim dash

American

[jim] / dʒɪm /

noun

Printing, Journalism.

a dash, often three ems long, used within a headline, between the headline and the main body of printed matter, between items in a single column, or between related but different material within a story.

jim, probably special use of Jim proper name

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023