We found 4 dictionaries that define the word softbacks:

General (4 matching dictionaries)

1. softbacks: Merriam-Webster
2. softbacks: Vocabulary.com
3. softbacks: Wiktionary
4. softbacks: TheFreeDictionary.com

(Note: See softback as well.)

Definitions from Wiktionary (softback) ▸ noun:  A softcover or paperback book. ▸ Also see softback ▸ Words similar to softbacks ▸ Usage examples for softbacks ▸ Idioms related to softbacks ▸ Wikipedia articles (New!) ▸ Popular adjectives describing softbacks ▸ Words that often appear near softbacks ▸ Rhymes of softbacks ▸ Invented words related to softbacks