motto

Short definition from Wiktionary

Noun

1. 1
   A personal slogan.
2. 2
   A sentence, phrase, or word, forming part of an heraldic achievement.
3. 3
   A sentence, phrase, or word, prefixed to an essay, discourse, chapter, canto, or the like, suggestive of its subject matter; a short, suggestive expression of a guiding principle; a maxim.
4. 4
   A paper packet containing a sweetmeat, cracker, etc., together with a scrap of paper bearing a motto.

Verb

1. 1
   To compose mottos.