Extinguishment
EXTIN'GUISHMENT, noun The act of putting out or quenching; extinction; suppression; destruction; as the extinguishment of fire or flame; of discord, enmity or jealousy; or of love or affection.
1. Abolition; nullification.
Divine laws of christian church policy may not be altered by extinguishment
2. Extinction; a putting an end to, or a coming to an end; termination; as the extinguishment of a race or tribe.
3. The putting an end to a right or estate, by consolidation or union.
If my tenant for life makes a lease to A for life, remainder to B and his heirs, and I release to A; this release operates as an extinguishment of my right to the reversion.