the GNU version of the Collaborative International Dictionary of English
adj. Rejoicing together; congratulatory.
The Century Dictionary and Cyclopedia
Congratulating; expressing congratulation.
n. One who congratulates: a congratulator.
Word Usage
"He sat in the squared posture of a hearty Englishman, amusing himself with everything they passed on the road self-congratulant on the knowledge and experience he had been storing, joking as often as he spoke."