| ephemeral definitions |
| # | Definition | Sets |
| 1 | short-lived | 200 sets |
| 2 | momentary, fleeting | 142 sets |
| 3 | short-lived; fleeting | 124 sets |
| 4 | lasting a very short time | 115 sets |
| 5 | enduring a very short time | 97 sets |
| 6 | lasting a short time | 96 sets |
| 7 | short lived | 65 sets |
| 8 | momentary, transient, fleeting | 64 sets |
| 9 | lasting only a short time, short-lived | 58 sets |
| 10 | lasting a short period of time, fleeting | 58 sets |
| 11 | adj. lasting for a very short time | 50 sets |
| 12 | temporary | 49 sets |
| 13 | lasting for only a brief time | 48 sets |
| 14 | brief; fleeting | 42 sets |
| 15 | lasting for a very short time | 39 sets |
| 16 | lasting only a brief time; short-lived | 38 sets |
| 17 | short-lived, fleeting | 35 sets |
| 18 | fleeting | 34 sets |
| 19 | lasting for a markedly brief time | 34 sets |
| 20 | lasting only a short time | 32 sets |
| 21 | lasting a very short time; short-lived; transitory | 22 sets |
| 22 | (adj.) lasting only a short time, short-lived | 22 sets |
| 23 | lasting for a short time; fleeting | 20 sets |
| 24 | lasting for only a short time | 18 sets |
| 25 | lasting for a short time | 18 sets |
| 26 | lasting one day only; fleeting; transitory; short-lived; transient | 17 sets |
| 27 | short-lived; fleeting; not lasting | 17 sets |
| 28 | lasting a very short time. | 16 sets |
| 29 | temporary; short-lived | 15 sets |
| 30 | short lived, fleeting | 15 sets |
| 31 | adj. lasting for a short time; fleeting | 14 sets |
| 32 | lasting only a brief time | 14 sets |
| 33 | lasting a very short time; short-lived | 14 sets |
| 34 | brief | 13 sets |
| 35 | short-lived, temporary | 13 sets |
| 36 | a lasting a very short time | 13 sets |
| 37 | lasting only a short time, short lived | 13 sets |
| 38 | (adj) brief; fleeting | 12 sets |
| 39 | adj. short-lived; fleeting | 12 sets |
| 40 | short-lived; transitory; lasting for a very short time | 11 sets |