MERG'ER, noun [Latin mergo, to merge.] In law, a merging or drowning of a less estate in a greater; as when a reversion in fee simple descends to or is purchased by a tenant of the same estate for years, the term for years is merged, lost, annihilated in the inheritance or fee simple estate.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI