We found 23 dictionaries that define the word secret service:

General (20 matching dictionaries)

1. secret service: Longman Dictionary of Contemporary English
2. secret service, the Secret Service, the secret service: Merriam-Webster
3. Secret Service, secret service: Oxford Learner's Dictionaries
4. secret service: Collins English Dictionary
5. Secret Service: Vocabulary.com
6. secret-service, secret service: Wordnik
7. secret service: Cambridge Advanced Learner's Dictionary
8. secret service: Wiktionary
9. secret service: The Wordsmyth English Dictionary-Thesaurus
10. secret service: Infoplease Dictionary
11. Secret Service, secret-service: Dictionary.com
12. Secret Service (TV series), Secret Service (band), Secret Service (disambiguation), Secret Service (magazine), Secret Service, Secret service, The Secret Service (comics), The Secret Service (film), The Secret Service: Wikipedia, the Free Encyclopedia
13. Secret service: Rhymezone
14. secret service: AllWords.com Multi-Lingual Dictionary
15. secret service: FreeDictionary.org
16. secret service: Mnemonic Dictionary
17. secret service: TheFreeDictionary.com
18. secret service: American Heritage Dictionary of the English Language

Business (1 matching dictionary)

19. Secret Service: Legal dictionary

Computing (1 matching dictionary)

20. secret service: Encyclopedia

Slang (1 matching dictionary)

21. Secret Service: Urban Dictionary

(Note: See secret_services as well.)

Definitions from Wiktionary (secret service) ▸ noun:  A governmental agency that deals with espionage and other acts of secrecy. Similar: security service, secret police, company, secretariat, secret agent, secret agentry, undersecretariat, security detail, secretariate, special agent, more... Opposite: public service, open service, transparent service Phrases: United States Secret Service, Secret Intelligence Service, us secret service, The Secret Service, Secret Service code name, more... Adjectives: official, supervisorial, commissionary, supervised, secondary, superintendent, officiary, intendant, executive, federal, sup ▸ Words similar to secret service ▸ Usage examples for secret service ▸ Idioms related to secret service ▸ Wikipedia articles (New!) ▸ Words that often appear near secret service ▸ Rhymes of secret service ▸ Invented words related to secret service