feeling or showing pleasure or contentment

Melissa came in looking happy and excited

we're just happy that he's still alive

they are happy to see me doing well

having a sense of trust and confidence in (a person, arrangement, or situation)

he was not happy about the proposals

I can't say they looked too happy about it, but a deal's a deal

fortunate and convenient

he had the happy knack of making people like him

inclined to use a specified thing excessively or at random

our litigation-happy society

they tended to be grenade-happy