fixed; hence, closely compressed; compact; substantial; hard; solid; -- applied to the matter of bodies; as, firm flesh; firm muscles, firm wood.-not easily excited or disturbed; unchanging in purpose; fixed; steady; constant; stable; unshaken; not easily changed in feelings or will; strong; as, a firm believer; a firm friend; a firm adherent.-solid; -- opposed to fluid; as, firm land.-indicating firmness; as, a firm tread; a firm countenance.-the name, title, or style, under which a company transacts business; a partnership of two or more persons; a commercial house; as, the firm of hope & co.-to fix; to settle; to confirm; to establish.-to fix or direct with firmness.