1. [ noun ] any diversion intended to distract attention from the main issue
Related terms: diversion
2. [ noun ] (writing) a first draft of a prospectus; must be clearly marked to indicate that parts may be changed in the final prospectus
Synonyms: preliminary_prospectus

"because some portions of the cover page are printed in red ink a preliminary prospectus is sometimes called a red herring"

Related terms: course_catalog
3. [ noun ] (chemistry,food) a dried and smoked herring having a reddish color
Synonyms: smoked_herring
Related terms: herring