Source : Webster's Revised Unabridged Dictionary (1913)

Firmly \Firm"ly\, adv.
   In a firm manner.

Source : WordNet®

firmly
     adv 1: with resolute determination; "we firmly believed it"; "you
            must stand firm" [syn: {firm}, {steadfastly}, {unwaveringly}]
     2: in a secure manner; in a manner free from danger; "she held
        the child securely" [syn: {securely}]
     3: with firmness; "held hard to the railing" [syn: {hard}]