Firm a. [Compar. Firmer superl. Firmest.]
  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.