Person or thing that inspires enthusiasm

noun

1. A factor or situation that causes people to feel motivated to do something incentive

   "Only a fool, though, would deny that money is a very real and basic need and, of course, a motivator of sorts."

2. A person who motivates others

   "But Romo's not an enabler; he's a motivator, says [Jessica] Simpson. "If I'm not feeling good about myself, he'll say, 'Get your butt up and go to the gym then!'""