Definition
The acts, omissions, or behavior of a person or entity that carries legal significance in a given context. Conduct is one of the most pervasive terms in legal usage precisely because it is not confined to a single doctrine or field — it functions as the factual raw material that law evaluates, classifies, and assigns consequences to across nearly every area of practice.
Three broad legal senses operate concurrently:
1. Conduct as a basis for liability. In tort and criminal law, conduct denotes the voluntary physical acts (or deliberate omissions) of a person that the law uses to determine fault. A defendant's conduct is measured against a standard — reasonable care, intent, recklessness — to determine whether liability attaches. The term is deliberately broad: it encompasses a single act, a pattern of behavior, or a course of dealing.
2. Conduct as a standard of professional or fiduciary obligation. In legal ethics, fiduciary law, and judicial administration, conduct describes the behavior of lawyers, judges, trustees, and other duty-bearers measured against professional rules or equitable standards. Here the inquiry is not merely what happened, but whether the conduct was consistent with the role's obligations.
3. Conduct as the management or administration of a proceeding, election, or transaction. In this sense, to conduct means to carry out or supervise — "conduct of an election," "conduct of litigation." The legal weight falls on the authority and propriety of the management, not on personal behavior.
Common Language
Modern common usage (Wiktionary): To lead, guide, or be in charge of people or tasks; to behave; to serve as a medium for transmitting heat, electricity, or other forces; to direct a musical performance.
Historical common usage (Webster's 1913): The act or method of conducting; guidance; management; skillful generalship. The term carried strong connotations of purposeful direction and leadership.
The gap between common and legal meaning is less about kind than about scope and precision. In ordinary usage, conduct skews toward active leadership — directing, escorting, transmitting. In legal usage, conduct is deliberately value-neutral on its face: it encompasses passive omissions, inadvertent acts, and systemic patterns of behavior, not just purposeful direction. A person's "conduct" in a negligence case may be a single moment of inattention, nothing like the managerial sense ordinary English foregrounds. Researchers reading historical legal materials must not import the common-language sense of purposeful control.
Common Confusion
Conduct vs. behavior vs. act: These terms circulate interchangeably in both statutes and judicial opinions, but subtle distinctions emerge in specific doctrinal contexts. Act typically refers to a discrete, completed physical event. Behavior often signals a pattern or course of action observed over time. Conduct is the broadest of the three — it encompasses single acts, omissions, patterns, and states — and is the preferred term in legal standards precisely because of that breadth. Problems arise when researchers assume a statute's use of "conduct" is narrower than it is, or when historical sources use "behavior" where modern doctrine uses "conduct."
Why It Matters in Research
The term's breadth is its primary research trap. Because conduct appears in virtually every legal field, keyword searches return massive, undifferentiated results. Effective corpus research requires pairing conduct with a limiting qualifier — "disorderly conduct," "fiduciary conduct," "conduct of litigation," "course of conduct" — to locate the relevant doctrinal cluster.
Historical sources are often unhelpful on this term in isolation. Bouvier's redirects to IMPROPER CONDUCT; Burrill's redirects to SAFE CONDUCT. This signals that the historical dictionaries treated conduct as too general to define directly, preferring to define its qualified forms. Researchers working with pre-twentieth-century sources should expect the same pattern in primary materials: courts and legislatures defined specific categories of conduct rather than the concept itself.
The criminal law context deserves special attention. "Disorderly conduct" and its near-synonyms ("disorderly behavior," "breach of peace," "misconduct") have shifted in scope across jurisdictions and eras. Conduct that was punishable under municipal ordinance in the nineteenth century — Anderson's notes this explicitly — may or may not map onto modern disorderly conduct statutes. The category was also used historically to capture behavior that fell below felony grade but was still penally significant, a classification boundary that has since been redrawn in most jurisdictions.
In fiduciary and probate contexts, "conduct" carries a heightened evaluative charge. An objection to fiduciary conduct is not merely a factual dispute about what happened — it invokes an equitable standard of loyalty, care, and good faith that the historical dictionaries only gesture at through the cross-reference to equitable estoppel in Anderson's.
In civil procedure, "bad faith litigation conduct" is a distinct term of art used to justify inherent-power sanctions beyond the reach of formal rule-based sanctions. Researchers should not assume that general references to "conduct" in procedural sources carry this specific meaning.
Historical Dictionary Support
The three source dictionaries offer almost no direct definitional content for conduct as a standalone term. Bouvier's points to IMPROPER CONDUCT; Burrill's points to SAFE CONDUCT; Anderson's provides the most substantive content, but primarily in the context of managing elections and defining misdemeanor-level criminal behavior.
Anderson's reference to elections — that authority to "conduct" an election includes the power to declare its result — reflects a nineteenth-century administrative concern about the scope of delegated authority, a question that recurs in modern election law under different statutory frameworks. The criminal subentry in Anderson's, equating conduct with any indictable offense below felony grade, is a historical artifact of a tiered offense structure that modern codes have largely replaced with misdemeanor and infraction classifications. Researchers should not assume that historical usage of "conduct" as a criminal category maps cleanly onto contemporary statutory language.
What the historical dictionaries collectively miss is the modern tort and regulatory sense of conduct as the factual predicate for liability analysis — the sense most heavily worked in twentieth- and twenty-first-century doctrine.
Encyclopedia Cross-Reference
Disorderly Conduct and Breach of Peace — The Law Mind Criminal Law Encyclopedia (criminal_107)
Contested Accountings and Objections to Fiduciary Conduct — The Law Mind Trusts, Estates & Probate Encyclopedia (estates_160)
Inherent Power Sanctions and Bad Faith Litigation Conduct — The Law Mind Civil Procedure & Evidence Encyclopedia (civpro_141)