Anything that is particularly good of its class(noun)
A very good-looking person(noun)
One who sings forcefully.(noun)
A song suitable for forceful singing.(noun)
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Use "belter" in a sentence
"The strip, rolled diligently, is what the locals call a belter, and the outfield, shorn of excess length, will allow the ball to travel."
"New Formula One season will be 'belter' says Jenson Button"
"A visit to the "Great White Way" of Broadway - with memories rekindled of "belter" Ethel Merman - was captured in the Irving Berlin classic tribute to performers "There's No Business Like Show Business" that had both ladies assuming a distinctively recognizable "New Yawk" accent in their singing!"