We found 14 dictionaries that define the word line block:

General (8 matching dictionaries)

1. line block: Merriam-Webster
2. line block: Collins English Dictionary
3. line block: Vocabulary.com
4. line block: Dictionary.com
5. line block: Rhymezone
6. line block: FreeDictionary.org
7. line block: Mnemonic Dictionary
8. line block: TheFreeDictionary.com

Art (2 matching dictionaries)

9. English-Chinese Dictionary of Graphic Communications (Big 5) (No longer online)
10. Glossary of Stamp Collecting Terms (No longer online)

Business (2 matching dictionaries)

11. line block: Legal dictionary
12. line block: Financial dictionary

Computing (1 matching dictionary)

13. line block: Encyclopedia

Medicine (1 matching dictionary)

14. line block: Medical dictionary

(Note: See line_blocks as well.)

Definitions from WordNet (line block) ▸ noun:  engraving consisting of a block that has been etched or engraved Phrases: clew line block, more... ▸ Words similar to line block ▸ Usage examples for line block ▸ Idioms related to line block ▸ Wikipedia articles (New!) ▸ Words that often appear near line block ▸ Rhymes of line block ▸ Invented words related to line block