Definition of "black tie" []

• A black bow tie worn with a tuxedo. (noun)
• Semiformal evening wear typically for men, usually requiring a tuxedo. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "He was dressed in khakis with a blue shirt and a black tie with red Jolly Rogers pirate flags printed on it."
• "We got dressed in black tie and drove to Buckingham Palace with Jimmy and Susan Baker and Nick and Kitty Brady."
• "He wore a Hawaiian-print shirt with a black tie that had a picture of a surfer on it, but the thing that really stood out was his enormous straw hat adorned with a lei."