Effusive (ĭ-fyū’sĭv) is an adjective used to describe someone expressing his emotions excessively or enthusiastically. Such emotions could be gratitude, approval, praise, pleasure and so on. The opposite of effusive is restrained.
Some would dismiss Mr. McGreevey’s ever-effusive enthusiasm as political self-promotion. (NY Times)
Front-running Democrat Hillary Clinton, a New York senator seeking to be the first female president, won an effusive welcome at a mainly black Baptist church in snowy Waterloo, Iowa. (Reuters)