What is the meaning of prejudicial?

adjective

• Sometimes followed by `to'. ( causing harm or injury)
  • usage: "damaging to career and reputation"; "the reporter's coverage resulted in prejudicial publicity for the defendant"
  • synonyms: damaging, detrimental, prejudicious
• Tending to favor preconceived ideas.
  • usage: "the presence of discriminatory or prejudicial attitudes in the white population"
  • synonyms: prejudicious