What is "preclearance"

n. 1 A procedure to arrange for clearing customs or immigration in advance 2 (context US legal English) Advance approval by a federal court or the Department of Justice for changes to voting regulations in certain states under the 1965 Voting Rights Act

Preclearance may refer to:

• United States border preclearance, allowing U.S.-bound passengers to clear border inspection at established locations outside the country
• The preclearance requirement, Section 5 of the U.S. Voting Rights Act of 1965