[n] the act of exterminating
[n] complete annihilation; "they think a meteor cause the extinction of the dinosaurs"
\Ex*ter`mi*na"tion\, n. [Cf. F. extermination.]
1. The act of exterminating; total destruction; eradication; excision; as, the extermination of inhabitants or tribes, of error or vice, or of weeds from a field.
2. (Math.) Elimination. [R.]