Source : Webster's Revised Unabridged Dictionary (1913)

Stringent \Strin"gent\ (str[i^]n"jent), a. [L. stringens,
   -entis, p. pr. of stringere to draw or bind tight. See
   {Strain}.]
   Binding strongly; making strict requirements; restrictive;
   rigid; severe; as, stringent rules.

         They must be subject to a sharper penal code, and to a
         more stringent code of procedure.        --Macaulay.
   -- {Strin"gent*ly}, adv. -- {Strin"gent*ness}, n.

Source : WordNet®

stringent
     adj : demanding strict attention to rules and procedures;
           "rigorous discipline"; "tight security"; "stringent
           safety measures" [syn: {rigorous}, {tight}]