1. Fixed; hence, closely compressed; compact; substantial; hard; solid; -- applied to the matter of bodies; as, firm flesh; firm muscles, firm wood.
2. 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.
"Under spread ensigns, moving nigh, in slow But firm battalion." -- Milton.
"By one man's firm obediency fully tried." -- Milton.
3. Solid; -- opposed to fluid; as, firm land.
4. Indicating firmness; as, a firm tread; a firm countenance.
Syn. -- Compact; dense; hard; solid; stanch; robust; strong; sturdly; fixed; steady; resolute; constant.