A documentary, memorial, or historical book published every year, containing information about the previous year.
A usually bound publication compiled by the graduating class of a school or college, recording the year's events and typically containing photographs of students and faculty.
1588, "book of reports of cases in law-courts for that year," from year + book. Meaning "book of events and statistics of the previous year" is recorded from 1710. Sense of "graduating class album" is attested from 1926, Amer.Eng.