Is “Copybook” a Scrabble word?
Yes
COPYBOOK
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Copybook
noun
1.A student's exercise book containing samples of good handwriting to be copied.
2.A notebook containing blank, often lined, pages for writing answers.
3.A series of instructions or data definitions copied into multiple programs from a shared library; boilerplate.