Definition
To transact means to carry on, conduct, or bring to completion a business dealing or legal matter. The term appears in legal texts in two overlapping senses:
1. General commercial sense: To conduct or carry on business activity — as in "transacting business" within a jurisdiction, which triggers regulatory, tax, and procedural consequences. This is the dominant modern American legal usage.
2. Civil and Scots law sense: To settle or compound a dispute — to reach a transactio, meaning a compromise or settlement between parties that resolves a pending or anticipated legal controversy without resort to arbitration or judgment. In this sense, to transact is to make a transaction in the older Roman law meaning: not an exchange of goods, but an agreement that ends litigation.
The distinction matters because the same verb does very different legal work depending on context and era.
Common Language
Modern common usage (Wiktionary): To do, carry through, conduct, or perform; to conduct business; to exchange or trade ideas, money, or goods.
Historical common usage (Webster's 1913): To carry through; to do; perform; to manage — as in transacting commercial business or transacting business by an agent.
The common English meaning tracks the general commercial sense closely, but misses the civil law and Scots law meaning entirely. A researcher encountering "transact" in historical legal texts — particularly those touching Roman law, Scots law, or early equity proceedings — should not assume it means merely "to conduct business." In those contexts it more likely signals a settlement or compound of a dispute, a meaning with no foothold in modern ordinary usage.
Common Confusion
The noun form "transaction" has drifted far from the verb's civil law meaning. Modern lawyers use "transaction" almost exclusively to mean a commercial deal or exchange. But in civil law tradition and in Scots law, a transactio was specifically a settlement agreement — a mechanism for ending litigation — not a commercial exchange. Bouvier and Burrill both preserve this usage. Researchers who encounter "transact" or "transaction" in pre-19th century common law texts or in Scots law materials should pause before assuming commercial rather than litigatory meaning.
Why It Matters in Research
Jurisdictional and regulatory context: In modern American law, the phrase "transacting business" is a term of art with significant jurisdictional consequences. Whether a foreign corporation is "transacting business" in a state determines whether it must qualify to do business there, whether it is subject to local taxation, and whether courts have personal jurisdiction over it. The phrase appears throughout state business registration statutes and long-arm jurisdiction frameworks. Researchers working in corporate, tax, or procedural law will encounter it constantly, often without a statutory definition — courts have developed their own tests.
Tax research: The phrase "transacting business" is central to related party transaction analysis, transfer pricing, and questions of whether a taxpayer is carrying on a trade or business within a jurisdiction. The Law Mind Tax Encyclopedia entry on Related Party Transactions addresses contexts where who is doing the transacting — and with whom — has direct tax consequences.
Historical trap: Researchers working in equity, civil law, or Scots law materials will find "transact" used in the settlement/compound sense. Lord Hardwicke's usage in Ambler 185 — cited by both Burrill and Black's — is the anchor for this historical meaning. Confusing the settlement sense with the commercial sense produces misreadings of early chancery and civilian texts.
Corpus navigation: Because "transact" in legal corpora spans two distinct meanings across centuries and traditions, keyword searches will return mixed results. Filter by jurisdiction and era: Scots law and civil law sources through roughly the 19th century use the settlement meaning; American regulatory and corporate sources from the late 19th century forward use the commercial/jurisdictional meaning.
Historical Dictionary Support
The four shelf sources are largely in agreement but address different aspects of the term. Burrill and both editions of Black's cite Lord Hardwicke in Ambler 185 for the Scots law meaning — to compound, that is, to settle a dispute by agreement. This is consistent with the civil law transactio described in Black's 2nd edition, which draws on Hallifax's Analysis of the Civil Law for the proposition that a transactio was a settlement made between litigating parties themselves, distinguished from arbitration.
Bouvier adds the American common usage gloss, noting that in common parlance "transact" is equivalent to "carry on" when used in reference to business, citing an 1886 Montana authority. This reflects the divergence already underway in American legal language by the late 19th century, where the commercial meaning was displacing the civil law settlement meaning in everyday practice.
What the historical dictionaries collectively miss is the modern regulatory and jurisdictional significance of "transacting business" as a statutory term of art — unsurprisingly, since that usage crystallized through 20th-century corporate law and long-arm statutes. For modern research, the historical sources are most useful for decoding the settlement meaning in historical texts; they do not speak to contemporary jurisdictional doctrine.
Jurisdictional Note
American states vary considerably in how they define "transacting business" for purposes of foreign corporation qualification and personal jurisdiction. Most have not legislatively defined the phrase, leaving courts to apply fact-specific tests. The Model Business Corporation Act offers guidance that many states have adopted in whole or part, but application remains inconsistent. Researchers should not assume uniform meaning across state lines.
Encyclopedia Cross-Reference
Related Party Transactions — The Law Mind Tax Encyclopedia (tax_162)