We found 12 dictionaries that define the word principal sum:

General (8 matching dictionaries)

1. principal sum: Merriam-Webster
2. principal sum: Vocabulary.com
3. principal sum: Dictionary.com
4. Principal sum: Wikipedia, the Free Encyclopedia
5. principal sum: Rhymezone
6. principal sum: FreeDictionary.org
7. principal sum: Mnemonic Dictionary
8. principal sum: TheFreeDictionary.com

Business (2 matching dictionaries)

9. principal sum: Legal dictionary
10. principal sum: Financial dictionary

Computing (1 matching dictionary)

11. principal sum: Encyclopedia

Medicine (1 matching dictionary)

12. principal sum: Medical dictionary

(Note: See principal_sums as well.)

Definitions from WordNet (principal sum) ▸ noun:  capital as contrasted with the income derived from it ▸ Words similar to principal sum ▸ Usage examples for principal sum ▸ Idioms related to principal sum ▸ Wikipedia articles (New!) ▸ Words that often appear near principal sum ▸ Rhymes of principal sum ▸ Invented words related to principal sum