/ˈklʌstə(r) ||; ˈklʌstɚ/noun [C] a group of people, plants or things that stand or grow close together ﹙人﹑植物﹑东西的﹚丛╱群╱团: a cluster of schoolchildren一群学童
cluster²
/ˈklʌstə(r) ||; ˈklʌstɚ/verbcluster around sb/sth to form a group around sb/sth 聚集在某人或某物的周围；围拢: The tourists clustered around their guide.游客簇拥着导游。