Source : Webster's Revised Unabridged Dictionary (1913)

Groom \Groom\, v. i. [imp. & p. p. {Groomed}; p. pr. & vb. n.
   {Grooming}.]
   To tend or care for, or to curry or clean, as a, horse.

Source : WordNet®

grooming
     n 1: activity leading to skilled behavior [syn: {training}, {preparation}]
     2: the activity of getting dressed; putting on clothes [syn: {dressing}]