noun
Refers to a gathered group of people, animals, or things. Often used for a single cluster or assembly, not a formal organization.
公園にハトの一群がいた。
There was a flock of pigeons in the park.
観光客の一群がガイドの後ろを歩いていた
A group of tourists was walking behind the guide.
noun
wide expanse (of flowers)
Used for a broad, visually striking spread of flowers, often in natural settings. Less common than sense 1.
丘の斜面に菜の花の一群が広がっていた。
A wide expanse of rapeseed flowers spread across the hillside.