The Oxford Thesaurus An A-Z Dictionary of Synonyms - yearlyadv.

1) annually, perennially, every year, once a year, year after year, year in (and) year out, regularly: We watch the Canada geese migrate north yearly. 2) per year, per annum, by the year, each year: What is the interest rate yearly? --adj. 3) annual, perennial, once-a-year, regular: Those yearly migrations told us when to plant the first crop.