1. Someone who deliberately stirs up irritations or problems; troublemaker: In Mrs. Robin's class there was a troubler who caused a lot or distress among the other students, and for herself as well.
2. Something that disturbs or afflicts: In Lynn's garden there were many troublers which caused her a lot of work, for example, the extreme amount of unwanted plants or weeds to pull and destructive insects.to get rid of.