I. i-ˈfem-rəl, -ˈfēm-; -ˈfe-mə-, -ˈfē- adjective
Etymology: Greek ephēmeros lasting a day, daily, from epi- + hēmera day
Date: 1576
1. : lasting one day only
an ephemeral fever
2. : lasting a very short time
ephemeral pleasures
Synonyms: see transient
• ephem·er·al·ly -rə-lē adverb
II. noun
Date: 1807
: something ephemeral ; specifically : a plant that grows, flowers, and dies in a few days