the property of being able to exist for an indefinite duration

continuing or enduring without marked change in status or condition or place

the property of not existing for indefinitely long durations

the property of not existing for indefinitely long durations

lacking stability or fixity or firmness

the property of being able to exist for an indefinite duration

serving temporarily especially as a substitute

lasting a very short time

limited in duration to a single episode

tending to vanish like vapor

ephemeral