Source : Webster's Revised Unabridged Dictionary (1913)

Strictly \Strict"ly\, adv.
   In a strict manner; closely; precisely.

Source : WordNet®

strictly
     adv 1: restricted to something; "we talked strictly business" [syn:
             {purely}]
     2: in a stringent manner; "the laws are stringently enforced";
        "stringently controlled" [syn: {stringently}]
     3: in a rigorous manner; "he had been trained rigorously by the
        monks" [syn: {rigorously}]