What does the word plum mean?

Usage examples for plum

  1. You gave me the first Christmas gift I ever got in my life- a piece of plum cake. – The Tempering by Charles Neville Buck
  2. You'd soon weary of the sugar- plum business, and so should I. I have read somewhere that the true way to keep a man a lover is to give him plenty of work." – His Sombre Rivals by E. P. Roe
  3. A groom in a plum- colored livery stood at my elbow. – Humorous Ghost Stories by Dorothy Scarborough