Definition of register book in English:

register book

noun

  • A book or volume in which information of any kind is regularly and accurately recorded; especially any of various official or authoritative books of record having some public or commercial importance.

Origin

Early 16th century; earliest use found in Galway Archives. From register + book.

Pronunciation

register book

/ˈrɛdʒɪstə ˌbʊk/