(Greek: advocate or consoler)
An appellation of the Holy Ghost.
Christ promises to send the Apostles "another Paraclete" (John 14:16) so they may not be desolate orphans when He departs.
Christ was the first advocate or comforter and He continues His advocacy for us in Heaven (John 11:1).
The Holy Ghost is the advocate in the Church, Who pleads God's cause with men, Who keeps the Church from error, and sanctifies souls through the ministry of the word and the sacraments.
The supernatural power that produces all the effects of grace on earth is appropriated to the Holy Ghost though really the work belongs to the Blessed Trinity.
New Catholic Dictionary