Source : Webster's Revised Unabridged Dictionary (1913)

Prate \Prate\, v. i. [imp. & p. p. {Prated}; p. pr. & vb. n.
   {Prating}.] [Akin to LG. & D. praten, Dan. prate, Sw. & Icel.
   prata.]
   To talk much and to little purpose; to be loquacious; to
   speak foolishly; to babble.

         To prate and talk for life and honor.    --Shak.

         And make a fool presume to prate of love. --Dryden.

Prate \Prate\, v. t.
   To utter foolishly; to speak without reason or purpose; to
   chatter, or babble.

         What nonsense would the fool, thy master, prate, When
         thou, his knave, canst talk at such a rate ! --Dryden.

Prate \Prate\, n. [Akin to LG. & D. praat, Sw. prat.]
   Talk to little purpose; trifling talk; unmeaning loquacity.

         Sick of tops, and poetry, and prate.     --Pope.

Source : WordNet®

prate
     n : idle or foolish and irrelevant talk [syn: {prattle}, {idle
         talk}, {blether}, {chin music}]

prate
     v : speak (about unimportant matters) rapidly and incessantly
         [syn: {chatter}, {piffle}, {palaver}, {tittle-tattle}, {twaddle},
          {clack}, {maunder}, {prattle}, {blab}, {gibber}, {tattle},
          {blabber}, {gabble}]