We found 18 dictionaries that define the word booster shot:

General (11 matching dictionaries)

1. booster shot: Merriam-Webster
2. booster shot: American Heritage Dictionary of the English Language
3. booster shot: Vocabulary.com
4. booster shot: Wiktionary
5. booster shot: The Wordsmyth English Dictionary-Thesaurus
6. booster shot: Dictionary.com
7. Booster shot: Wikipedia, the Free Encyclopedia
8. booster shot: Rhymezone
9. booster shot: FreeDictionary.org
10. booster shot: Mnemonic Dictionary
11. booster shot: TheFreeDictionary.com

Business (2 matching dictionaries)

12. Booster Shot: Investopedia
13. Booster Shot: Financial dictionary

Computing (1 matching dictionary)

14. booster shot: Encyclopedia

Medicine (4 matching dictionaries)

15. booster shot: Merriam-Webster Medical Dictionary
16. Booster shot: MedTerms.com Medical Dictionary
17. booster shot: Medical dictionary
18. Booster shot: Drug Medical Dictionary

(Note: See booster_shots as well.)

Definitions from Wiktionary (booster shot) ▸ noun:  A dose of an antigen (usually a vaccine) designed to strengthen immunity after an earlier immunizing dose. Similar: booster dose, booster, recall dose, booster injection, autoadjuvant, immunoadjuvant, adjuvant, vaccine, vaccinum, immunostimulant, more... Opposite: initial shot, first dose, primary vaccination ▸ Words similar to booster shot ▸ Usage examples for booster shot ▸ Idioms related to booster shot ▸ Wikipedia articles (New!) ▸ Words that often appear near booster shot ▸ Rhymes of booster shot ▸ Invented words related to booster shot