Collective Noun: These nouns are the name of collection or group of persons, places or things.

Examples

• A crowd has created all these problems.
• The jury has decided to send him to jail.
• A flock of sheep is grazing in the field.
• A bunch of keys has been lost.

A few collective nouns:

• A committee of members
• A flock of sheep
• A herd of cattle
• A swarm of insects
• A bevy of girls
• A galaxy of stars
• A gang of bandits
• A class of learners
• A fleet of ships
• An archipelago of islands