- Lasting for a markedly brief time: "There remain some truths too ephemeral to be captured in the cold pages of a court transcript” ( Irving R. Kaufman). (adjective)
- Living or lasting only for a day, as certain plants or insects do. (adjective)
- A markedly short-lived thing. (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.