What is the meaning of groom?

noun

• A man participant in his own marriage ceremony.
  • synonyms: bridegroom
• Someone employed in a stable to take care of the horses.
  • synonyms: stableman, stableboy, hostler, ostler
• A man who has recently been married.
  • synonyms: bridegroom

verb

• Educate for a future role or function.
  • usage: "He is grooming his son to become his successor"; "The prince was prepared to become King one day"; "They trained him to be a warrior"
  • synonyms: prepare, train
• Give a neat appearance to.
  • usage: "groom the dogs"; "dress the horses"
  • synonyms: dress, curry
• Care for one's external appearance.
  • usage: "He is always well-groomed"
  • synonyms: neaten