Definition of panini
: a usually grilled sandwich made with Italian bread ◆Panini is a plural form in Italian but is commonly used as both a singular and a plural in English. On each visit, someone at our table invariably orders a panini … — Jodi Wright Its use as a singular has given rise the variant plural form paninis. At the back of the shop are paninis, freshly brewed coffee and two tubs of homemade soups. — M. H. Reed The use of panino as a singular form in English has become relatively uncommon as panini has become established as the usual singular.
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