noun

• (cycling) The peloton; the main group of riders formed during a race.
• (US, informal) A considerable amount.
  "a bunch of trouble"
• (informal) An unmentioned amount; a number.
  "A bunch of them went down to the field."
• (forestry) A group of logs tied together for skidding.

verb

• (transitive) To gather into a bunch.
• (transitive) To gather fabric into folds.
• (intransitive) To form a bunch.
  ""Permissive" working allows more than one train to be in a block section at one time but trains must be run at low speed in order to stop on sight behind the train in front. Such working is often authorised to allow freight trains to "bunch" together to await a path through a bottleneck instead of being strung out over several block sections, as would be necessary if absolute working were in force."
• (intransitive) To be gathered together in folds