We found 20 dictionaries that define the word harder:

General (15 matching dictionaries)

1. harder: Merriam-Webster
2. harder: Collins English Dictionary
3. harder: Vocabulary.com
4. Harder, harder: Wordnik
5. harder: Cambridge Advanced Learner's Dictionary
6. Harder, harder: Wiktionary
7. Harder, harder: Dictionary.com
8. harder: Cambridge Essential American English Dictionary
9. Harder (Jax Jones and Bebe Rexha song), Harder: Wikipedia, the Free Encyclopedia
10. Harder: Online Plain Text English Dictionary
11. harder: Webster's Revised Unabridged, 1913 Edition
12. Harder: Rhymezone
13. Harder: AllWords.com Multi-Lingual Dictionary
14. harder: FreeDictionary.org
15. Harder: TheFreeDictionary.com

Business (1 matching dictionary)

16. harder: Legal dictionary

Computing (1 matching dictionary)

17. harder: Encyclopedia

Medicine (2 matching dictionaries)

18. Harder: Merriam-Webster Medical Dictionary
19. online medical dictionary (No longer online)

Miscellaneous (1 matching dictionary)

20. harder: Idioms

(Note: See hard as well.)

Definitions from Wiktionary (Harder) ▸ noun:  A surname. ▸ noun:  Alternative spelling of haarder [(South Africa) Planiliza haematocheilus, the redlip mullet, a mugilid fish.] Similar: easier, tough, difficult, tricky, better, impossible, easer, faster, stronger, quicker, more... Opposite: softer, easier, simpler, lighter, gentler Phrases: Heinrich Harder, The Harder They Come, Love Me Harder, Josh Harder, Harder Than It Looks, more... Adjectives: much, easier, old, same, stablein, submarine, schulz Colors:     charcoal,     gunmetal,     iron,     graphite,     onyx, more... ▸ Words similar to harder ▸ Usage examples for harder ▸ Idioms related to harder ▸ Wikipedia articles (New!) ▸ Popular adjectives describing harder ▸ Words that often appear near harder ▸ Rhymes of harder ▸ Invented words related to harder