Bar

As used in immigration, a prohibition against re-entry into the U.S. after leaving. For instance, a foreign national who accrues 180 days of "unlawful presence" in the U.S. and then departs is subject to a three-year bar to reentry (the person cannot return to the U.S. for three years from departure). There is a ten year bar for departure after one year of unlawful presence, and other bars of varying lengths are applicable to other circumstances.