We found 15 dictionaries that define the word seven-year itch:

General (11 matching dictionaries)

1. seven-year itch: Oxford Learner's Dictionaries
2. seven-year itch, seven-year itch: Collins English Dictionary
3. seven-year itch: Cambridge Advanced Learner's Dictionary
4. seven-year itch: Wiktionary
5. seven-year itch: Infoplease Dictionary
6. seven-year itch: Dictionary.com
7. seven-year itch: Online Etymology Dictionary
8. Seven-year itch, The seven-year itch: Wikipedia, the Free Encyclopedia
9. seven-year itch: TheFreeDictionary.com

Computing (1 matching dictionary)

10. seven-year itch: Encyclopedia

Medicine (1 matching dictionary)

11. Dorland's Illustrated Medical Dictionary (No longer online)

Miscellaneous (1 matching dictionary)

12. seven-year itch: Idioms

Slang (1 matching dictionary)

13. seven-year itch: Urban Dictionary

Definitions from Wiktionary (seven-year itch) ▸ noun:  (colloquial) Scabies. ▸ noun:  (colloquial) The temptation to have an affair after seven years of being married. Similar: itchies, yeuk, scritch, itch, yuke, youk, squickage, dickache, tickle, buck fever, more... Opposite: loyalty, commitment, devotion Phrases: The seven-year itch, more... ▸ Word origin ▸ Words similar to seven-year itch ▸ Usage examples for seven-year itch ▸ Idioms related to seven-year itch ▸ Wikipedia articles (New!) ▸ Words that often appear near seven-year itch ▸ Rhymes of seven-year itch ▸ Invented words related to seven-year itch