Source : Webster's Revised Unabridged Dictionary (1913)

Plague \Plague\, v. t. [imp. & p. p. {Plagued}; p. pr. & vb. n.
   {Plaguing}.]
   1. To infest or afflict with disease, calamity, or natural
      evil of any kind.

            Thus were they plagued And worn with famine.
                                                  --Milton.

   2. Fig.: To vex; to tease; to harass.

            She will plague the man that loves her most.
                                                  --Spenser.

   Syn: To vex; torment; distress; afflict; harass; annoy;
        tease; tantalize; trouble; molest; embarrass; perplex.