1. a group of similar things growing or held together
2. a group of people, animals, or things close together

1. to come together in a group or groups
2. to cause things to form a group

Examples

• A cluster of grapes hung from the vine.
• The students formed a cluster around the teacher.
• Stars often cluster together in galaxies.
• The houses cluster around the town square.
• She noticed a cluster of flowers in the garden.
• The data points cluster in the upper right corner.
• Birds cluster on the telephone wires.