We found 12 dictionaries that define the word senior citizens:

General (8 matching dictionaries)

1. senior citizens: Merriam-Webster
2. senior citizens: Collins English Dictionary
3. senior citizens: Vocabulary.com
4. senior-citizens: Wordnik
5. senior citizens: Cambridge Advanced Learner's Dictionary
6. senior citizens: Wiktionary
7. Senior Citizens, Senior citizens: Wikipedia, the Free Encyclopedia
8. Senior citizens: TheFreeDictionary.com

Business (1 matching dictionary)

9. Senior Citizens: Legal dictionary

Computing (1 matching dictionary)

10. Senior citizens: Encyclopedia

Medicine (1 matching dictionary)

11. Senior citizens: Medical dictionary

Slang (1 matching dictionary)

12. senior citizens: Urban Dictionary

(Note: See senior_citizen as well.)

Definitions from Wiktionary (senior citizen) ▸ noun:  An old person, variously considered to be a person over fifty, fifty-five, sixty, or sixty-five years of age. ▸ Also see senior_citizen Phrases: Maintenance and Welfare of Parents and Senior Citizens Act, 2007, more... ▸ Words similar to senior citizens ▸ Usage examples for senior citizens ▸ Idioms related to senior citizens ▸ Wikipedia articles (New!) ▸ Words that often appear near senior citizens ▸ Rhymes of senior citizens ▸ Invented words related to senior citizens