say it: uh-mer-uh-KAN-uh
americana is a noun meaning "any artifact (such as books or furniture or art) that is distinctive of America". It carries one recorded sense.
any artifact (such as books or furniture or art) that is distinctive of America
furniture · art
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 americana 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.