angel’s trumpetn. Any of several tropical or subtropical American plants of the genera Brugmansia or Datura in the nightshade family, having large, variously colored trumpet-shaped flowers.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.