say it: A-nyoo-uhl
annual is a noun and adjective meaning "(botany) a plant that completes its entire life cycle within the space of a year". It carries 4 recorded senses.
a reference book that is published regularly once every year
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for annual come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.