In toto is a Latin phrase that means in all, or completely. For example, if a judge accepts a lawyer's argument in toto, it means that the judge accepts the entire argument.
The phrase in toto is also commonly used in the context of rescission of contracts. It is a settled principle of law that if a contract has to be rescinded it has to be rescinded in toto. See these historical cases for examples: Lyon v. Bertram, 61 U.S. 149 (1857) and Quest Medical, Inc. v. Apprill, 998 F.2d 1014 (5th Cir. 1993).
[Last updated in April of 2022 by the Wex Definitions Team]