"gregarious" in the adjective sense
1. gregarious
of animals) tending to form a group with others of the same species
"gregarious bird species"
2. gregarious
instinctively or temperamentally seeking and enjoying the company of others
"he is a gregarious person who avoids solitude"
3. gregarious
of plants) growing in groups that are close together
Source: WordNet® (An amazing lexical database of English)
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