We found 5 dictionaries that define the word pin numbers:

General (3 matching dictionaries)

1. PIN numbers: Cambridge Advanced Learner's Dictionary
2. PIN numbers: Wiktionary
3. PIN numbers: TheFreeDictionary.com

Business (1 matching dictionary)

4. PIN numbers: Financial dictionary

Computing (1 matching dictionary)

5. PIN numbers: Encyclopedia

(Note: See pin_number as well.)

Definitions from Wiktionary (PIN number) ▸ noun:  A common pleonastic form of PIN (in the sense of "personal identification number"). ▸ Also see pin_number ▸ Words similar to pin numbers ▸ Usage examples for pin numbers ▸ Idioms related to pin numbers ▸ Wikipedia articles (New!) ▸ Words that often appear near pin numbers ▸ Rhymes of pin numbers ▸ Invented words related to pin numbers