We found 22 dictionaries that define the word straight line:

General (16 matching dictionaries)

1. straight line: Longman Dictionary of Contemporary English
2. straight-line: Merriam-Webster
3. straight-line: Oxford Learner's Dictionaries
4. straight-line: American Heritage Dictionary of the English Language
5. straight-line, straight-line: Collins English Dictionary
6. straight line: Vocabulary.com
7. Straight-line, straight-line: Wordnik
8. straight line: Wiktionary
9. straight-line: Webster's New World College Dictionary, 4th Ed.
10. straight-line: Infoplease Dictionary
11. straight-line, straight line: Dictionary.com
12. Straight Line (film), Straight-line, Straight line: Wikipedia, the Free Encyclopedia
13. straight line: Rhymezone
14. straight line: FreeDictionary.org
15. straight line: Mnemonic Dictionary
16. straight-line, straight line: TheFreeDictionary.com

Business (2 matching dictionaries)

17. Glossary of Legal Terms (No longer online)
18. straight-line: Financial dictionary

Computing (1 matching dictionary)

19. straight line: Encyclopedia

Science (2 matching dictionaries)

20. A Glossary of Mathematical Terms (No longer online)
21. Straight Line: Eric Weisstein's World of Mathematics

Tech (1 matching dictionary)

22. PhotoNotes Dictionary of Film and Digital Photography (No longer online)

(Note: See straight_lines as well.)

Definitions from Wiktionary (straight line) ▸ noun:  (geometry) A line with no curvature; a line with constant direction. The path of shortest length between two points. Similar: line, curve, half-line, rectification, normal, line segment, segment, directrix, streamline, Lin., more... Opposite: curve, arc, bend, crook, kink, bend in the road, bend in the river Types: line segment, ray, more... Phrases: straight line depreciation, straight line method, straight line method of depreciation, a straight line, projection of a straight line of a plane, more... Adjectives: developable, dirigent, right, truncate, coplanar, plane, ordinate, rectangular, verticle, ruled, solid ▸ Words similar to straight line ▸ Usage examples for straight line ▸ Idioms related to straight line ▸ Wikipedia articles (New!) ▸ Words that often appear near straight line ▸ Rhymes of straight line ▸ Invented words related to straight line