We found 11 dictionaries that define the word for pete's sake:

General (5 matching dictionaries)

1. for Pete's sake, for Pete's sake: Collins English Dictionary
2. for Pete's sake: Wiktionary
3. For Pete's Sake, For Pete's Sake, For Pete's Sake (The Monkees song), For Pete's Sake (film): Wikipedia, the Free Encyclopedia
4. For Pete's Sake: TheFreeDictionary.com
5. For Pete’s sake: World Wide Words

Business (1 matching dictionary)

6. For Pete's Sake: Legal dictionary

Computing (1 matching dictionary)

7. For Pete's Sake: Encyclopedia

Miscellaneous (2 matching dictionaries)

8. AbbreviationZ (No longer online)
9. For Pete's sake, for Pete's sake: Idioms

Slang (2 matching dictionaries)

10. for Pete's sake: English slang and colloquialisms used in the United Kingdom
11. for pete's sake: Urban Dictionary

Definitions from Wikipedia (For Pete's Sake) ▸ noun:  a 1974 American screwball comedy film starring Barbra Streisand and directed by Peter Yates. ▸ Words similar to for pete's sake ▸ Usage examples for for pete's sake ▸ Idioms related to for pete's sake ▸ Wikipedia articles (New!) ▸ Words that often appear near for pete's sake ▸ Rhymes of for pete's sake ▸ Invented words related to for pete's sake