na-adjective, noun which may take the genitive case particle 'no'
somewhat large; on the large side; oversized
Describes something as being larger than usual or larger than expected, but not necessarily huge. Often used for clothing, portions, or physical objects. Compare with 小振り (こぶり, 'smallish').
See also: 小振り
このコートは大振りで、ゆったり着られます。
This coat is on the large side, so you can wear it loosely.
大
Arrange the food on a large plate.
noun, noun or participle which takes 'suru'
big swing; long sweeping stroke
Used in sports such as baseball, tennis, or golf to describe a full, powerful swing. Can also refer to a broad, sweeping motion in other contexts. Often used with する to mean 'take a big swing'.
彼は大振りしてホームランを打った。
He took a big swing and hit a home run.
大振りせずに、正確に打つことが大切だ。
It's important to hit accurately without swinging too hard.