v. To speak passionately; to preach for or against something.
The Century Dictionary and Cyclopedia
To make an oration; talk loftily; harangue.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. talk pompously
Word Usage
"Sen. Obama, like many other politicians, uses teleprompters, so his great ability to orate is based mainly on his ability to read and not speak from the hip."