Definition
1. (Business organizations) A partnership — the group of persons who together constitute a partnership and carry on business under a common name. The term refers both to the collective body of partners and to the name or title under which they transact business. "Firm" in this sense is used interchangeably with "partnership," and related terms such as "house," "concern," and "company" carry the same meaning in commercial contexts.
The firm name is a conventional designation that attaches only to those persons who, at any given time, are in fact members of the partnership. A change in membership — through death, withdrawal, or addition of a partner — technically dissolves the old firm and creates a new one, even if the business continues under the same name.
2. (Contract law) A "firm offer" is a written, signed offer that is held open and irrevocable for a stated period without requiring consideration to support that commitment. Under Article 2 of the Uniform Commercial Code, a firm offer made by a merchant in a signed writing cannot be revoked during the time stated (or, if no time is stated, for a reasonable time not to exceed three months). This usage is analytically distinct from the partnership meaning and arises almost exclusively in commercial sales contexts.
Common Language
Modern common usage (Wiktionary): Steadfast, secure, solid in position; fixed in opinion; insistent; durable; mentally resistant.
Historical common usage (Webster's 1913): Fixed; closely compressed; compact; solid; hard — applied to matter or character; not easily excited or disturbed; unchanging in purpose.
The common meaning of "firm" describes a quality: steadfastness, solidity, resistance to change. The legal meanings are nominal — a firm is a thing (a partnership), not a characteristic. The contract-law usage of "firm offer" does borrow from the common meaning (an offer that holds fast, that does not yield), making it the more intuitive of the two legal senses. Researchers encountering "firm" in older business or commercial documents should not assume the adjective sense governs; context nearly always signals whether a partnership or a binding offer is meant.
Recognized Forms
/SUBTYPES
Major firm / Minor firm: Where several persons form one partnership and a subset of those persons (not all) form a second partnership, the former is the "major firm" and the latter the "minor firm." This distinction carries legal consequences in insolvency: a member of the minor firm may prove a claim against the major firm in bankruptcy proceedings, and vice versa, subject to rules governing joint and separate assets.
Firm offer (UCC §2-205): A merchant's written, signed offer to buy or sell goods, which is irrevocable for the period stated or, absent a stated period, for a reasonable time not exceeding three months — without need for consideration.
Why It Matters in Research
The word "firm" is a navigational hazard in the Law Mind corpus because it functions as two unrelated legal terms and as a common adjective, all within the same historical period and sometimes within the same document. A nineteenth-century commercial case may use "firm" to mean the partnership in one sentence and describe an agreement as "firm and binding" in another.
In partnership law research, historical sources treat "firm" and "partnership" as synonymous, but the firm name carries distinct legal significance: liability, agency, and proof of debt in bankruptcy all turn on who was a member of the firm at the relevant moment, not merely who traded under the name. The Rapalje & Lawrence entry on major and minor firms is one of the few historical sources that explicitly addresses the multi-firm membership problem — researchers working on partnership insolvency should note that this distinction is largely absent from Black's and Bouvier's.
In contracts research, "firm offer" as a term of art is almost entirely a post-UCC phenomenon. Searches in pre-Code materials for "firm offer" will return results about offers described as firm in the adjective sense — reliable, not-to-be-revoked — without the technical UCC meaning. Conflating these will produce false positives. The UCC firm offer rule (§2-205) displaces common-law doctrine requiring consideration to make an offer irrevocable; researchers tracing the development of option contract doctrine should treat pre-Code and post-Code materials as governed by different rules.
Jurisdictional note for the firm-offer rule: §2-205 applies only to merchants and only to goods; it does not extend to service contracts or real property transactions. Some states have enacted variations. The Encyclopedia entries below address both the general option-contract framework and the specific UCC provision.
Historical Dictionary Support
Black's (both editions), Bouvier's, and Anderson's agree without variation: "firm" means the persons constituting a partnership and the name under which they do business. This consistency reflects settled commercial usage by the mid-nineteenth century. Bouvier adds the useful observation that "house," "concern," and "company" are used in the same sense — a reminder that corpus searches for partnership entities should not be limited to the word "firm" alone.
Rapalje & Lawrence diverges from the others by addressing structural complexity — the major/minor firm distinction — that the other dictionaries pass over entirely. This suggests the major/minor framework was recognized doctrine in insolvency practice even if it did not make it into the general-purpose dictionaries. Researchers in partnership bankruptcy should weight Rapalje & Lawrence heavily here.
None of the historical dictionaries address the firm offer in the contract-law sense. That usage is a twentieth-century development, and its absence from historical sources is itself informative: any pre-Code reference to a "firm" offer is almost certainly adjectival, not technical.
Encyclopedia Cross-Reference
The Law Mind Contracts & Commercial Law Encyclopedia:
— Option Contracts and Firm Offers (contracts_15)
— UCC Article 2 — Firm Offers (§2-205) (contracts_112)