What is Assurance?

Legal Definition
Conveyancing. This is called a common assurance. But the term assurances includes, in an enlarged sense, all instruments which dispose of property, whether they be the grants of private persons, or not; such are fines and recoveries, and private acts of the legislature. Eunom. Dial. 2, s. 5.
-- Bouviers Law Dictionary
Legal Definition
In conveyancing. A deed or instrument of conveyance. The legal evidences of the transfer of property are in England called the "common assurances" of the kingdom, whereby every man's estate is assured to him, and all controversies, doubts, and difficulties are either prevented or removed. 2 Bl. Comm. 294. State v. Farrand, 8 N. J. Law, 335. In contracts. A making secure; insurance. The term was formerly of very frequent use in the modern sense of insurance, particularly in English maritime law, and still appears in the policies of some companies, but is otherwise seldom seen of late years. There seems to be a tendency, however, to use assurance for the contracts of life insurance companies, and insurance for risks upon property. Assurance, further, covenant for. See Covenant.
-- Black's Law Dictionary
Legal Definition
Com. law. Insurance. (q. v.)
-- Bouviers Law Dictionary
Legal Definition
Any instrument evidencing title to land; insurance.
-- Ballentine's Law Dictionary