FOOTNOTE

[noun] [C] - a note printed at the bottom of a page or in a list at the end of a book or article and which gives extra information about something that has been written on that pageThe book is 900 pages long, and has many footnotes.(figurative) As a footnote (= something extra) to what I was saying before...(figurative) He said that homelessness was no longer a footnote (= something unimportant) to the political agenda, but had become a matter of central concern.(figurative) The crisis seemed of great importance at the time, but it later became just a footnote (= something unimportant) to history.