Generic for Italian almond flavored liqueur, now produced internationally. Notable brand example: Amaretto Di Saronno (which has now largely dropped the "amaretto" from its name, much as Cointreau dropped the term "triple sec" from its label 90 years ago - and for the same reason: too many competitors making amarettos and devaluing the liqueur Di Saronno made famous.)
Generally available. Produced and sold in Italy and United States. Distributed world-wide. Available for on-line ordering in some markets.