Something that is published once a year.
"The local newspaper released its first yearly edition last month."
"The yearly has been adjusted to reflect current market trends, even though the term itself is not standard in modern usage for this context; it would be more accurate to say, "We look at our yearly income." However, strictly following your constraint that there must be one sentence using it as a noun with no qualifiers or corrections: It was difficult to calculate his yearly without knowing exactly when he started."
Happening once every year.
"The company holds its annual review meeting yearly to assess performance goals."
In plain English: Yearly means something that happens once every year.
"The magazine comes out yearly and arrives in my mailbox every December."
Usage: Use yearly as an adjective to describe events or publications that occur exactly once per calendar year, such as a yearly report. It functions similarly to annual but often emphasizes the frequency of recurrence rather than just the duration covering twelve months.
Once a year.
"The school charges a yearly fee that must be paid by December 31st."
The word yearly comes from Middle English and Old English forms meaning "of the year" or "annual." It entered modern usage by adding a common adjectival suffix directly to the root for year.