Definition - What does Immigrant Visa mean?
An immigrant visa is a form of permission by the United States government that allows immigrants to legally enter the United States in order to attempt to become legal permanent residents. If an immigrant is granted the status of a legal permanent resident, then he or she will receive a "green card" and will be allowed to legally live and work in the United States.
Justipedia explains Immigrant Visa
Immigrant visas are an alternative to non-immigrant visas. Non-immigrant visas are visas that are given to people who will be spending a certain amount of time in the United States, but will not be attempting to live there permanently and obtain full citizenship. Non-immigrant visas are given to people such as diplomats, or business people who are spending time in the United States for business reasons. Immigrant visas are specifically for people who wish to live permanently in the United States.
Step by Step: Here’s What Happens When You're Charged with a Crime