means A bound or spiral collection of blank pages for writing notes, lists, sketches, or whatever your brain needs to offload.

from A plain compound of "note" and "book." "Note" comes from Latin "nota" (a mark or sign), the same root that gives us "notation" and "notable"; "book" traces back to Old English "bōc," possibly linked to "beech," the tree whose bark and wood were said to have been used for early writing — a tidy image, though that connection is debated. Put together, the word simply names what it is: a book for your notes.