impermanent
- a not permanent; not lasting
politics is an impermanent factor of life"- James Thurber
impermanent palm cottages - s existing or enduring for a limited time only
- The consequences are wry, wistful, impermanent.
- Before the phonographic era, improvisation was as impermanent as a cloud of smoke.
- He can work in the realm of pure fantasy without worrying much about his client's idea of how a building ought to look, because he is using (perhaps happily) impermanent .