What is the meaning of boy?

noun

• A youthful male person.
  • usage: "the baby was a boy"; "she made the boy brush his teeth every night"; "most soldiers are only boys in uniform"
  • synonyms: male child
• A friendly informal reference to a grown man.
  • usage: "he likes to play golf with the boys"
• A male human offspring.
  • usage: "their son became a famous judge"; "his boy is taller than he is"
  • synonyms: son
• Ethnic slur. ( offensive and disparaging term for Black man)
  • usage: "get out of my way, boy"