Definition
En masse is a French phrase used in legal writing to mean "all together," "as a whole," or "in a single undivided group." In legal contexts, it describes action taken collectively rather than individually — whether by parties, claimants, jurors, documents, or legal instruments. The term appears most commonly in procedural and evidentiary writing, where the manner of presentation or treatment (as a group versus individually) carries legal consequence.
The phrase carries no technical definition unique to law; its legal force derives entirely from context. When a court rules on objections en masse, it addresses them together rather than one by one. When claimants are joined en masse, they proceed as a collective unit rather than as separate litigants. The phrase signals aggregation.
Common Language
Modern common usage (Wiktionary): "In a single body or group; as one, together. In large amounts or numbers, massively."
Historical common usage (Webster's 1913): "In a mass; in a body; applied to a general movement of troops, or to any collective action.
The common and legal meanings are essentially aligned: both describe collective or wholesale action rather than individual action. The legal significance lies not in any gap between meanings but in the procedural weight that attaches when courts or practitioners use the term — specifically, whether treating items or parties en masse satisfies due process, evidentiary, or joinder requirements.
Common Confusion
A note on the source material: one of the historical dictionary entries attributed to "en masse" appears to be a misplaced entry defining a consensual contract for sale at a set price. This definition belongs to a different term (likely "en bloc" in one usage, or possibly a transcription error from an entry on sales contracts). Researchers should not treat that definition as relevant to en masse. The consistent, correct meaning across both editions is simply "in a mass; in a lump; at wholesale."
Why It Matters in Research
En masse appears in procedural contexts where aggregation raises legal questions — chiefly in mass tort litigation, class actions, multi-district litigation, and evidentiary rulings. Courts and commentators use the phrase when addressing whether claimants, claims, exhibits, or objections can be handled collectively without individual attention. This makes it a meaningful signal in case law research: its presence often marks a court's reasoning about the tension between efficiency and individualized process.
In historical legal materials, en masse also appears in property and commercial contexts — transfers en masse, releases en masse — describing conveyances or discharges of multiple interests in a single instrument. Researchers working in 19th-century property or commercial records should expect the phrase in that sense.
The phrase also appears in legislative and administrative law contexts: regulations issued en masse, dismissals en masse of agency employees, or en masse rejection of claims by administrative tribunals. In each context, the phrase signals that individualized review either did not occur or is being challenged.
One research trap: because en masse carries no fixed legal definition, courts use it loosely. Its presence in a judicial opinion does not itself resolve whether collective treatment was legally permissible — it merely describes what occurred. Researchers must look to the surrounding doctrine (joinder rules, due process, evidentiary foundation requirements) to assess the legal sufficiency of the en masse treatment being described.
Historical Dictionary Support
Both editions of Black's Law Dictionary define en masse identically and briefly: "in a mass; in a lump; at wholesale." This is consistent across the two editions and accurately reflects the term's ordinary function as a borrowed French phrase carrying no specialized legal meaning beyond its plain import.
The inclusion in Black's signals that practitioners and courts used the phrase with sufficient frequency to warrant a dictionary entry, but the editors offered no elaboration — itself instructive. Unlike terms with contested or technical legal meanings, en masse required only a gloss. Both editions agree entirely. No evolution, no divergence.
The historical dictionaries do not address the procedural contexts in which en masse treatment becomes legally significant — that analysis is developed entirely through case law and secondary sources, not lexicographic definition.
Encyclopedia Cross-Reference
Mass Tort Litigation (Overview and Procedure) — The Law Mind Torts & Personal Injury Encyclopedia
Bellwether Trials in Mass Torts — The Law Mind Torts & Personal Injury Encyclopedia