noun a word or phrase caught up and repeated for effect; as, the catchword of a political party, ·etc.
2. catchword ·noun among theatrical performers, the last word of the preceding speaker, which reminds one that he is to speak next; cue.
3. catchword ·noun the first word of any page of a book after the first, inserted at the right hand bottom corner of the preceding page for the assistance of the reader. it is seldom used in modern printing.