What does the word U mean?

Usage examples for U

  1. Rachel talked to them about the F. U. E. E., and was delighted by the flush of eager interest on Mrs. Mitchell's thin face. – The Clever Woman of the Family by Charlotte M. Yonge
  2. U. U. N. S. I. J. Perhaps you would like to work this out all by yourself- But no, I will have mercy and not sacrifice. – Gilbert Keith Chesterton by Maisie Ward
  3. I see your tug is named General U. S. Grant, and maybe he was fighting with General Grant, hey? – Roy Blakeley by Percy Keese Fitzhugh