- Any of various succulent, spiny, usually leafless plants native mostly to arid regions of the New World, having variously colored, often showy flowers with numerous stamens and petals. (noun)
- Any of several similar plants. (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.