ETYM Latin, from orare to speak, utter. Related to Oration.
A person who delivers a speech or oration; SYN. speechmaker, rhetorician, public speaker.

1. Someone who talks (especially someone who delivers a public speech); SYN. talker.
2. The presiding officer of a deliberative assembly
Presiding officer in the us House of Representatives. The speaker is second in line of succession to the presidency in the event of death or incapacitation.