bunch in WordNet English dictionary

1. a grouping of a number of similar things
   "a bunch of trees"; "a cluster of admirers"
   bunch  clump  cluster  clustering 
   
2. an informal body of friends
   "he still hangs out with the same crowd"
   crowd  crew  gang  bunch 
   
3. any collection in its entirety
   "she bought the whole caboodle"
   bunch  lot  caboodle 
   

1. gather or cause to gather into a cluster
   "She bunched her fingers into a fist"
   bunch  bunch up  bundle  cluster  clump 
   
2. form into a bunch
   "The frightened children bunched together in the corner of the classroom"
   bunch together  bunch  bunch up