cluster
US /ˈklʌs.tɚ/
UK /ˈklʌs.tɚ/
1.
a group of similar things or people positioned or occurring closely together
:
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There was a cluster of stars visible in the night sky.
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A small cluster of houses stood on the hillside.
1.
form a group or cluster
:
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The children clustered around the teacher.
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The tourists clustered together for a photo.