transient - Dictionary definition and meaning for word transient
remember transient light and transient current.... that we studied in physics.....which produce an effect for a very short time...
ORIGIN late 16th cent.: from Latin transient- â€˜going across,â€™ from the verb transire, from trans- â€˜acrossâ€™ + ire â€˜go.â€™
in transit:i.e. have to stay for some time,temporary stay
TRANSIENT which means unstable or momentary is the opposite of CONSTANT which refers to stability, something stable.
Transient means 'passing over' or 'crossing over'. So, any thing passing over or crossing over will be available for short period of time and hence will be "short lived".