catch line

noun

1

a

: a line containing a catchword

b

: a short line (as of less important words in a title or display advertisement) between lines that are longer and sometimes larger

c

: an identification line (as on a printer's proof or a manuscript)

2

: a phrase or sentence designed to catch attention especially in an advertisement or as a heading or title of a story, article, or newspaper item

3

: a line in a theatrical production expected to cause a laugh and often repeated as a gag

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