According to law; by, for, or In law; particularly in distinction from that which is done in or according to equity; or in titles such as sergeant at law, barrister at law, attorney or counsellor at law. See Hooker v. Nichols, 116 N. a 157, 21 S. E. 208.
Law Dictionary – Alternative Legal Definition
This phrase is used to point out that a thing is to be done according to the course of the common law; it is distinguished from a proceeding in equity. 2. In many cases when there is no remedy at law, one will be afforded in equity.