Life was the state of being alive.
History[]
Life existed on the planet Olympus before anywhere else in the universe. However, the Olympian Prometheus stole the life spores and released them, spreading life across the rest of the universe. (COMIC: The Life Bringer! [+]Steve Moore, DWM Comics (Marvel Comics UK, 1981).) This was known as the First Proliferation, described as "life's opening lunges from impossible planets circling frozen stars and black suns". (PROSE: The Knight, The Fool and The Dead [+]Steve Cole, Time Lord Victorious (BBC Books, 2020).)
The Seventh Doctor remarked that life would defeat Gavrok. (TV: Delta and the Bannermen [+]Malcolm Kohll, Doctor Who season 24 (BBC1, 1987).)
When Rusty the Dalek witnessed a new star be born from the remains of one that the Daleks had previously destroyed, it became convinced that its kind's perpetual was futile as "life returns, life prevails". (TV: Into the Dalek [+]Phil Ford and Steven Moffat, Doctor Who series 8 (BBC One, 2014).)
Mickey Smith (PROSE: Hoax This! [+]BBC webteam, Who is Doctor Who? (BBC, 2005)., Rose Tyler [+]BBC webteam, U.N.I.T. (BBC, 2005)., etc.) thought that Clive Finch had "tirelessly" dedicated his life to searching for the truth about the Doctor, with his reward being death. (PROSE: The Doctor Was Involved in the Dummy Massacre [+]BBC webteam, Who is Doctor Who? (BBC, 2005).)
In early 2006, Mickey mentioned his website that the Slitheen had attempted to end all life on the planet. (PROSE: Hoax This! [+]BBC webteam, Who is Doctor Who? (BBC, 2005).)
On Who is Doctor Who? in late 2006, Mickey recalled that when Rose returned a few months prior, she had said that she had to get back to Ninth Doctor as it was a "life and death" situation. (PROSE: Mars [+]BBC webteam, Who is Doctor Who? (BBC, 2005).)
Historians who had been allowed access to the "Monster Vaults" of the databanks in the Doctor's TARDIS observed that the heads of the Abzorbaloffs' absorbed victims remained alive and conscious within the Abzorbaloff's digestive tract and only when it had completely drained their brains were the heads fully assimilated into its "fleshy corpulence". (PROSE: The Monster Vault [+]Jonathan Morris and Penny CS Andrews, The Monster Vault (Penguin Group, 2020).)