Firm has 17 different meanings across 4 categories:
the members of a business organization that owns or operates one or more establishments
"he worked for a brokerage house"
A business partnership; the name under which it trades.
"They merged their two firms to create a stronger competitive presence in the market."
In plain English: A firm is a business that sells products or services to make money.
"The firm closed its doors after fifty years in business."
Usage: Use "firm" as a noun to refer to a professional business organization, such as a law or accounting company, rather than a physical object like a piece of furniture. It often appears in phrases like "join a firm" or "the legal firm."
To make firm or strong; fix securely.
"The carpenter hammered the brackets into place to firmly secure the heavy bookshelf against the wall."
In plain English: To firm something means to make it harder and less soft by pressing on it.
"The coach firmly corrected the player's form during practice."
Usage: Use the verb firm to mean making something solid or stable by tightening it, such as when you firm up your resolve or tighten a loose screw. Do not use it to describe becoming stiff naturally or hardening over time without an active agent.
marked by firm determination or resolution; not shakable
"firm convictions"
"a firm mouth"
"steadfast resolve"
"a man of unbendable perseverence"
"unwavering loyalty"
(of especially a person's physical features) not shaking or trembling
"his voice was firm and confident"
"a firm step"
unwavering in devotion to friend or vow or cause
"a firm ally"
"loyal supporters"
"the true-hearted soldier...of Tippecanoe"
"fast friends"
Steadfast, secure, solid (in position)
"The old oak tree stood firm against the fierce storm without bending even an inch."
In plain English: Firm means solid and not soft or squishy when you touch it.
"The firm handshake made me feel confident about the offer."
Usage: Use firm to describe something that is hard and solid to the touch or physically stable in place, such as a firm mattress or firm ground. Avoid using it when you simply mean strong, as that usually implies power rather than texture or stability.
with resolute determination
"we firmly believed it"
"you must stand firm"
The word firm entered English from Italian firma, originally meaning "signature" or the act of confirming something by signing it. Its modern sense of being solid or stable developed in the 18th century alongside its use to describe a business name.