A group of meerkats is commonly called a mob.
Meerkats are highly social mongooses that live in family groups, often containing several related adults and their young. Members cooperate in raising pups, guarding the group, finding food, and defending their territory.
One meerkat may stand upright as a sentinel while others forage. The lookout watches for predators such as eagles and jackals and gives an alarm call when danger approaches. Guard duty is shared rather than permanently assigned to one animal.
“Pride” is strongly associated with lions, while “troop” is commonly used for some primates. “Colony” can describe social animals living together, but “mob” is the standard familiar collective term for meerkats. Their social system is one reason they are popular subjects in zoological parks and wildlife documentaries.