What is a Grimoire?

What is a Grimoire?

Internet Sacred Text archive supplies definition and full description of term “grimoire.”  “The name ‘Grimoire’ is derived from the word ‘Grammar’.
A grammar is a description of a set of symbols and how to combine them
to create well-formed sentences.
A Grimoire is, appropriately enough,
a description of a set of magickal symbols and how to
combine them properly…”