What does annihilation mean?
The definition of annihilation
An*ni`hi*la”tion, n.
Etym: [Cf. F. annihilation.]

1 The act of reducing to nothing, or nonexistence; or the act of destroying the form or combination of parts under which a thing exists, so that the name can no longer be applied to it; as, the annihilation of a corporation.
2 The state of being annihilated. Hooker.