plural clusters
: a group of things or people that are close together
a flower cluster
a cluster of cottages along the shore
A small cluster of people had gathered at the scene of the accident.
clusters of grapes
clusters; clustered; clustering
always followed by a preposition or adverb
: to come together to form a group
The children clustered around the storyteller.
Cite this Entry
“Cluster.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/cluster. Accessed 15 Jun. 2026.
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