a general concept formed by extracting common features from specific examples

a group of five large, interconnected lakes in central North America

arrange into a group or groups

form a group or group together

all of the living human inhabitants of the earth

an orderly grouping (of things or persons) considered as a unit; the result of arranging

a wandering or disorderly grouping (of things or persons)

a basic group of natural objects

a group of plants or animals

a group of five large, interconnected lakes in central North America