DEF: expressing welcome, approval, or pleasure in a way that shows very strong feeling.
EX: In some countries, greeting is often very effusive; it includes a hug, 2 cheek kisses, a pat in the back and a hand holding (see video link below).
Merriam-Webster Online Dictionary
effusive (adjective)1.
marked by the expression of great or excessive emotion or enthusiasm - effusive praise
2.
archaic pouring freely
3.
characterized or formed by a nonexplosive outpouring of lava - effusive rocks
