1. once a year; something that appears yearly or lasts for a year سالی یکبار ، چیزی که هر ساله پدیدار می شود یا به مدت یک سال طول می کشد ، سالانه a. The annual convention of musicians takes place in Hollywood. b. The publishers of the encyclopedia put out a book each year called an annual. c. Plants that live only one year are called annuals.