noun

1. a person whose work is tending, feeding, and currying horses
2. any of certain officials of the British royal household
3. bridegroom
4. Archaic
   1. a manservant
   2. any man

Etymology: ME grom, boy, groom < ?

transitive verb

1. to clean and curry (a horse, dog, etc.)
2. to clean, make neat and tidy, etc.
3. to clean the fur, feathers, etc. of itself or another animal, often as a social activity
4. ☆ to train for a particular purpose to groom a man for politics