We found 3 dictionaries that define the word guide line:

General (2 matching dictionaries)

1. Guide line: Wikipedia, the Free Encyclopedia
2. guide line: Wiktionary

Art (1 matching dictionary)

3. Glossary of Stamp Collecting Terms (No longer online)

Definitions from Wiktionary (guide line) ▸ noun:  (underwater diving) distance line ▸ Words similar to guide line ▸ Usage examples for guide line ▸ Idioms related to guide line ▸ Wikipedia articles (New!) ▸ Words that often appear near guide line ▸ Rhymes of guide line ▸ Invented words related to guide line