Main entry: annual, one-year
Definition: completing its life cycle within a year
Usage: a border of annual flowering plants
Definition: having a life cycle lasting two seasons
Antonyms: perennial
Definition: lasting three seasons or more
Main entry: annual, yearly
Definition: occurring or payable every year
Usage: an annual trip to Paris; yearly medical examinations; annual (or yearly) income
Antonyms: nonperiodic, aperiodic
Definition: not recurring at regular intervals