say it: uh-GOH
ago is an adjective and adverb meaning "gone by; or in the past". It carries 2 recorded senses.
in the past
“long ago”
“sixty years ago my grandfather came to the U.S.”
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 ago 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.