Definition of "red light" [red light]

• The red-colored light that signals traffic to stop. (noun)
• Informal A command to stop. (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.

• "After she ran a red light in front of a sheriff, Mr. Casenberger accused her of having an attitude."
• "On the way home from Kennedy Airport, where she landed in June 1988, after we rolled across Manhattan toward the Lincoln Tunnel, a young woman in tight shorts approached our car at a red light on Forty-second Street."
• "One second I could be sitting at a red light minding my own and the next a Glock was being pushed through the window in my face."