Word of the Day - rubric

rubric

noun
ru·bric ˈrü-brik -ˌbrik
1a an authoritative rule
especially : a rule for conduct of a liturgical service
1b(1) name, title
specifically : the title of a statute
1b(2) something under which a thing is classed : category
1c an explanatory or introductory commentary : gloss
specifically : an editorial interpolation
2 a heading of a part of a book or manuscript done or underlined in a color (such as red) different from the rest
3 an established rule, tradition, or custom
4 a guide listing specific criteria for grading or scoring academic papers, projects, or tests

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Five, Seven, Five: For All Seasons

There's a rubric for a haiku
Which tells exactly what to do.
It is simple in its form,
Making it easy to conform.
But simple as it seems,
There's scope to share our dreams.