USP adjective 1noun 4forms 1 adjective[after a noun]1 •(US) Adhering to the standards of the United States Pharmacopeia; used after a drug's name.Clarithromycin Tablets, USP noun4 •Initialism of unique selling proposition/selling point.I came across this recipe when Helen Graham cooked it for Bracia and Friends, a pop-up whose USP is that chefs must cook a single dish. — 2024 •(US) Ellipsis of USP unit. •Initialism of user stored procedure. •Abbreviation of ultra-short period planet. formsUSPs