Source : Webster's Revised Unabridged Dictionary (1913)

Knightly \Knight`ly\, a. [AS. cnihtlic boyish.]
   Of or pertaining to a knight; becoming a knight; chivalrous;
   as, a knightly combat; a knightly spirit.

         For knightly jousts and fierce encounters fit.
                                                  --Spenser.

         [Excuses] full knightly without scorn.   --Tennyson.

Knightly \Knight"ly\, adv.
   In a manner becoming a knight.

         And why thou comest thus knightly clad in arms. --Shak.

Source : WordNet®

knightly
     adj 1: characteristic of the time of chivalry and knighthood in the
            Middle Ages; "chivalric rites"; "the knightly years"
            [syn: {chivalric}, {medieval}]
     2: having the qualities of gallantry attributed to an ideal
        knight [syn: {chivalrous}, {gallant}]