a memorable or effective word or phrase that is repeated so often that it becomes a slogan, as in a political campaign or in advertising a product.
a device, used especially in old books, to assist the binder in assembling signatures by inserting at the foot of each page the first word of the following page.
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How to use catchword in a sentence
The idea that jazz has become a catchword for pomposity is painful for those of us who care deeply about this music.
Whenever we take up a new idea as a crowd, we at once turn it into a catchword and a fad.The Behavior of Crowds | Everett Dean Martin
It used to be a catchword of naval correspondents that "submarine cannot fight submarine."The Story of Our Submarines | John Graham Bower
“Unclean,” he muttered, recalling a catchword of the world he gazed upon.Day and Night Stories | Algernon Blackwood
Despots obtain their mastery over the crowd by the sword: demagogues by the catchword.The Book of This and That | Robert Lynd
A man who has done that has seen England--not the name or the map or the rhetorical catchword, but the thing.First and Last | H. Belloc
British Dictionary definitions for catchword
a word or phrase made temporarily popular, esp by a political campaign; slogan
a word printed as a running head in a reference book
theatre an actor's cue to speak or enter
the first word of a printed or typewritten page repeated at the bottom of the page preceding
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012