Definition
To premeditate is to think about and plan a contemplated act before carrying it out. In criminal law, the term functions as an element of first-degree murder and certain other elevated offenses: the actor must have formed the intent to act and reflected on that intent — however briefly — prior to execution. Premeditation does not require extended planning or a calculated scheme. Courts consistently hold that the interval between formation of intent and the act may be very short; what matters is that some reflection, however momentary, preceded the act rather than accompanied it spontaneously.
---
Common Language
Modern common usage (Wiktionary): To meditate, consider, or plan beforehand; to think about and revolve in the mind beforehand.
Historical common usage (Webster's 1913): To think on, and revolve in the mind, beforehand; to contrive and design previously — as, to premeditate robbery.
The ordinary meaning of premeditate carries an implication of deliberate, advance planning — scheming, calculating, laying groundwork. The legal standard in most jurisdictions is significantly narrower: a momentary prior thought is sufficient. Researchers reading jury instructions or appellate decisions that cite "premeditation" should not assume the word carries its full common-language weight; courts have repeatedly distinguished premeditation from the colloquial sense of plotting or scheming at length.
---
Common Confusion
PREMEDITATE vs. DELIBERATE: These two terms are paired in first-degree murder statutes across most American jurisdictions — typically as "willful, deliberate, and premeditated" — but they are not synonymous. Deliberation connotes a weighing or consideration of the pros and cons of the intended act; premeditation connotes the prior formation of intent. The historical sources treat them as related but distinct mental states, and Black's 1st explicitly cross-references DELIBERATE without collapsing them into one term. In practice, some courts and older commentators treat premeditation and deliberation as nearly interchangeable, which creates interpretive noise in historical case law. A researcher encountering one term in a historical source should check whether the other was separately analyzed or silently folded in.
PREMEDITATE vs. AFORETHOUGHT: Malice aforethought is the mental state element for common-law murder generally; premeditation is the additional element that elevates murder to first-degree. These terms operate at different tiers of culpability analysis and should not be used as substitutes.
---
Core Elements
Courts have generally organized the premeditation inquiry around three considerations, sometimes called the Anderson factors in jurisdictions following that line of analysis:
1. Prior conduct: Evidence that the defendant planned or prepared for the act in advance — acquiring a weapon, lying in wait, traveling to a location — before the act occurred.
2. Prior relationship or motive: Evidence of prior threats, hostility, or a relationship that supplies a reason for the act, tending to show the killing was not impulsive.
3. Manner of the act: The nature of the act itself — its method, number of wounds, or deliberateness of execution — as circumstantial evidence of a preformed plan.
No single factor is required. These are analytical touchstones, not a formal checklist, and their weight varies by jurisdiction and case.
---
Why It Matters in Research
The core research trap with premeditate is temporal: how long must prior reflection last? Early American cases sometimes suggested premeditation required appreciable time — that a cooling period of some kind was implied. Modern doctrine in most jurisdictions has abandoned that requirement, holding that premeditation may be nearly instantaneous so long as it precedes the act. A researcher reading nineteenth-century opinions or treatises should be alert to this shift; language that appears to impose a durational requirement may not reflect current doctrine.
Jurisdictional variation is substantial. Some states have collapsed premeditation and deliberation into a single inquiry; others maintain them as analytically separate; a handful have restructured first-degree murder statutes to focus on specific categories of killing (lying in wait, poison, torture) rather than relying on premeditation as the defining element. Research that moves across jurisdictions should not assume the premeditation standard in one state maps onto another.
In the Law Mind corpus, premeditate operates most heavily in the homicide materials — connecting to first-degree murder doctrine, the willful-deliberate-premeditated formula, and the constitutional sufficiency-of-evidence question (whether evidence of premeditation is sufficient to sustain a conviction). Researchers should also look for premeditate in materials on attempted murder, where the same mental state typically applies to the attempt as would apply to the completed offense.
Note that the Anderson's Dictionary entry provided under this term does not address premeditate — the text concerns finality and determination language in tribunal contexts and appears to be a sourcing error. It contains no usable content on premeditation and should be disregarded.
---
Historical Dictionary Support
Black's 1st and 2nd editions are in complete agreement on the core definition: to think of an act beforehand; to contrive and design; to plot or lay plans for the execution of a purpose. The 2nd edition adds a companion entry for PREMEDITATION elaborating that premeditation is "the act of meditating in advance; deliberation upon a contemplated act; plotting or contriving; a design formed to do something before it is done." Both editions cross-reference DELIBERATE, treating the two terms as linked but not identical — a distinction courts have honored with varying consistency.
What the historical dictionaries miss is the doctrinal evolution on timing. Neither edition directly addresses the question of how brief the prior reflection may be, which became the central battleground in twentieth-century premeditation jurisprudence. The phrase "plotting or laying plans" in both editions implies some degree of advance scheming, which is broader than what modern doctrine requires and could mislead a researcher relying solely on these sources.
Webster's 1913 and Wiktionary track the historical legal definitions closely here — ordinary and legal usage were not far apart when these dictionary entries were written. The divergence has grown as criminal law doctrine has pared down the durational implication that common usage retains.
---
Jurisdictional Note
Some states have moved away from premeditation as the key dividing line between first- and second-degree murder, relying instead on enumerated categories (murder by poison, lying in wait, or in the commission of specified felonies). In these jurisdictions, premeditate may appear as an alternative basis for first-degree liability rather than the primary one. Federal murder statutes similarly tier premeditated killing alongside felony murder without making premeditation the sole path to elevated liability.
---
Encyclopedia Cross-Reference
Homicide — First-Degree Murder (Premeditation and Deliberation), The Law Mind Criminal Law Encyclopedia
---