Read the dictionary definition of barb. All definitions for this word.
1. one of the parallel filaments projecting from the main shaft of a feather
2. a subsidiary point facing opposite from the main point that makes an arrowhead or spear hard to remove
3. the pointed part of barbed wire
4. an aggressive remark directed at a person like a missile and intended to have a telling effect
1. his parting shot was `drop dead'
2. she threw shafts of sarcasm
3. she takes a dig at me every chance she gets
5. provide with barbs
1. barbed wire