the GNU version of the Collaborative International Dictionary of English
adj. Boiling up or over; hence, manifesting exhilaration or excitement, as of feeling; effervescing.
The Century Dictionary and Cyclopedia
Boiling over, as a liquid; overflowing; hence, over-enthusiastic; overdemonstrative.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. joyously unrestrained
Word Usage
"My own vote for best-dressed (and there were several contenders) goes to Caldecott Chair Gratia Banta, truly chic, glamorous and in ebullient in a strapless, shimmering orange gold gown that looked to me like it was made of silk shantung."