The American Heritage® Dictionary of the English Language, 4th Edition
abbreviation. forte-piano
abbreviation. freezing point
The Century Dictionary and Cyclopedia
An abbreviation of forte-piano.
Word Usage
"We have a large 0 gauge layout in the attic of the stable block at Carrot Court. fp is right, Hornby were very adventurous with there paint jobs, Weetabix springs to mind."