"According to the Dutch Prouerbe ... Leuen ende laetan leuen, To liue and to let others liue." [Malynes, 1622]To live it up "live gaily and extravagantly" is from 1951. To live up to "act in accordance with" is from 1690s. To live (something) down "outwear (some slander or embarrassment)" is from 1842. To live with "cohabit as husband and wife" is attested from 1749; sense of "to put up with" is attested from 1937. Lived-in "inhabited, occupied" is first recorded 1873. Live-in (adj.) first attested, 1955. Expression live and learn is attested from c.1620.
Having life; alive.
Capable of replicating in a host's cells.
Containing living microorganisms or active virus, as a vaccine.