Dictionary.com
definitions

h.

or H.

  1. harbor.
  2. hard.
  3. hardness.
  4. heavy sea.
  5. height.
  6. hence.
  7. high.
  8. Baseball. hit; hits.
  9. horns.
  10. Also hr. hour; hours.
  11. hundred.
  12. husband.

H.

  1. (in prescriptions) an hour.

Origin of H.

From the Latin word hōra
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for h.

h.

H.

abbreviation for
  1. harbour
  2. height
  3. hour
  4. husband
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012