a predetermination to commit an unlawful act without just cause or provocation (applied chiefly to cases of first-degree murder).
Origin of malice aforethought
First recorded in 1660–70
Also called malice prepense.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for malice aforethought
noun criminal law
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012