What is Insurer?

Legal Definition
A party, usually an insurance company, that contractually agrees to assume the risk of another party’s (the insured’s) losses and compensate for those losses. Also termed underwriter; insurance underwriter; carrier; assurer (for life insurance).
Legal Definition
Contracts. One who has obliged himself to insure the safety of another's property, in consideration of a premium paid, or secured to be paid, to hi.m. It is his duty to pay any loss which has arisen on the property insured. Vide Marsh. Ins. Index,.h. t.; Park. Ins. Index, h. t. Phill. Ins. h. t.; Wesk. Ins. h. t.; Pardess. Index, art. Assureur.
-- Bouviers Law Dictionary
Legal Definition
The underwriter or insurance company with whom a contract of insurance is made. The person who undertakes to indemnify another by a contract of insurance is called the "insurer," and the person indemnified is called the "insured." Civil Code Cal. § 2538.
-- Black's Law Dictionary
Legal Definition
One who agrees by a contract of insurance to indemnify. See Insurance.
-- Ballentine's Law Dictionary