a book spine presenting a completely flat surface.
a book bound with such a spine.
11 Back To School Quotes To Kick-Start The YearYou learn so much more than just facts and figures in school. These quotes show the importance of education outside of studying and tests.
Origin of flat back
First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019