Thayer's Greek Lexicon

 1. a calling near, summons, (esp. for help)
2. importation, supplication, entreaty
3. exhortation, admonition, encouragement
4. consolation, comfort, solace; that which affords comfort or refreshment
  1) thus of the Messianic salvation (so the Rabbis call the Messiah
the consoler, the comforter)
5. persuasive discourse, stirring address
  1) instructive, admonitory, conciliatory, powerful hortatory discourse