noun

• (archaic) A male servant, or more generally, a common man.
  "The needy groom, that never finger'd groat, Would make a miracle of thus much coin …"

verb

• (transitive) To care for (horses or other animals) by brushing and cleaning them.
• (transitive) To prepare (someone) for an event
  "It appears that Broderick's seconds, although cool, brave men, were entirely without experience in arranging a duel, and did not know that a man should be groomed for one as carefully as a horse is groomed for a race."
• (transitive) To prepare (someone) for election or appointment.
  "It is of special interest to note the subjects considered as important to those who are being groomed for top administrative posts"
• (transitive) To attempt to gain the trust of a child or vulnerable person in order to take advantage of or exploit them, especially sexually.
  "2009, Suzanne Ost, Child Pornography and Sexual Grooming: Legal and Societal Responses"