Firm1, a.
(18), a. [compar. FIRMER; superl. FIRMEST.] [Lat. firmus, Fr. ferme, Pr. form, It. fermo, Sp. & Pg. firme.]
Sense 1. Fixed; hence, closely compressed; compact; hard; solid; — applied to the matter of bodies; as, firm flesh; firm muscles; firm wood; firm cloth.
Sense 2. Not easily excited or disturbed; unchanging in purpose; not moved by other influences; fixed; steady; constant; stable; unshaken; not easily moved; — applied to the feelings and will; as, a firm believer; a firm friend; a firm adherent or supporter; a firm man, or a man of firm resolution.
Moving sigh
In slow, but firm, battalion. Milton.
By one man's firm obedience fully tried. Milton.
Sense 3. Not giving way; solid; — opposed to fluid; as, firm land.
As positive as the earth is firm. Shak.
Sense 4. Indicating firmness; as, a firm tread; a firm countenance.
Synonyms—Compact; dense; hard; solid; stable; stanch; robust; strong; sturdy; unshaken; fixed; steady; resolute; constant.