1.  handler(n = noun.person) animal trainer - one who trains or exhibits animals;
is a kind of trainer
has particulars: tamer
Derived form verb handle₆

2.  handler(n = noun.person) - an agent who handles something or someone; "the senator's campaign handlers"
is a kind of agent
Derived form verb handle₁

3.  handler(n = noun.person) coach, manager - (sports) someone in charge of training an athlete or a team;
is a kind of trainer
has particulars: baseball coach, baseball manager, basketball coach, conditioner, football coach, hockey coach, tennis coach, john joseph mcgraw, john mcgraw, mcgraw
Derived form verb handle₆

1.  one who trains or exhibits animals. [WordNet 1.5]

2.  someone in charge of training an athlete (especially a boxer) or a team.
"The term is used sometimes sarcastically of political consultants: “the president's handlers”." [WordNet 1.5]

handler, n.
1 a person who handles or deals in certain commodities.
2 a person who trains and looks after an animal (esp. a police dog).

money handler