Definitions for "non-immigrant visa"
a permit affixed or stamped to a page in the passport to the US
a sticker in your passport (it used to be a stamp, and in fact the term "visa stamp" is sometimes still used to distinguish it from the term "visa" when you really mean "status")
a visa issued by American Embassies and Consulates abroad to applicants traveling to the United States for a temporary period of time
a request to enter the United States to accomplish a specific purpose, such as visiting, studying, or working in a specialty job, after which