pack
n. countable B1 Intermediate Oxford US //ˈpæk// UK //pˈæk// pack
n. a group of things wrapped together or a set of animals that live and hunt together. You can also use it to describe a small bag you carry on your back.
n. a collection of related items wrapped or tied together for transport; alternatively, a social group of certain predatory animals. Often functions as a collective noun.
The wolves hunt together as a pack.
He opened a new pack of batteries to replace the ones in the remote control.
The lead cyclist managed to break away from the main pack during the final climb, securing a significant lead before the descent into the valley.
Usage
Commonly used as a collective noun followed by 'of' and a plural noun.