not permanent; not lasting; "politics is an impermanent factor of life"- James Thurber; "impermanent palm cottages"; "a temperary arrangement"; "temporary housing" 同义词:impermanent,
lacking continuity or regularity; "an irregular worker"; "employed on a temporary basis" 同义词:irregular,
a worker (especially in an office) hired on a temporary basis 同义词:temp, temporary worker,