We found 21 dictionaries that define the word grades:

General (10 matching dictionaries)

1. grades: Merriam-Webster
2. grades: Collins English Dictionary
3. grades: Vocabulary.com
4. Grade's, Grades, grade's, grades: Wordnik
5. grades: Cambridge Advanced Learner's Dictionary
6. grades: Wiktionary
7. grades: Dictionary.com
8. grades: Cambridge Essential American English Dictionary
9. Grades (producer), Grades: Wikipedia, the Free Encyclopedia
10. grades: TheFreeDictionary.com

Business (3 matching dictionaries)

11. Comprehensive Financial (No longer online)
12. grades: Legal dictionary
13. grades: Financial dictionary

Computing (1 matching dictionary)

14. grades: Encyclopedia

Medicine (2 matching dictionaries)

15. grades: Merriam-Webster Medical Dictionary
16. grades: Medical dictionary

Miscellaneous (3 matching dictionaries)

17. AbbreviationZ (No longer online)
18. grades: Idioms
19. GRADES: Acronym Finder

Tech (2 matching dictionaries)

20. Glossary of Agricultural Terms, Programs and Laws (No longer online)
21. Glossary of Agricultural Terms, Programs and Laws (No longer online)

(Note: See grade as well.)

Definitions from Wiktionary (grades) ▸ noun:  Grammar school, primary school, or the years of school prior to high school. Similar: degree, rate, mark, form, surface, place, order, class, range, ground level, more... Opposite: play, leisure, relaxation, fun, recreation Types: A, B, C, D, F, pass, fail, incomplete, more... Phrases: sixth grades, pay grades, fourth grades, standard grades, deliverable grades, more... Adjectives: lower, different, primary, higher, various, better, elementary, upper, intermediate, several, earlier ▸ Words similar to grades ▸ Usage examples for grades ▸ Idioms related to grades ▸ Wikipedia articles (New!) ▸ Popular adjectives describing grades ▸ Words that often appear near grades ▸ Rhymes of grades ▸ Invented words related to grades