We found 3 dictionaries that define the word open sights:

General (2 matching dictionaries)

1. open sights: Merriam-Webster
2. open sights: Vocabulary.com

Computing (1 matching dictionary)

3. Open sights: Encyclopedia

(Note: See open_sight as well.)

Definitions from WordNet (open sight) ▸ noun:  rear gunsight having an open notch instead of a peephole or telescope ▸ Also see open_sight ▸ Words similar to open sights ▸ Usage examples for open sights ▸ Idioms related to open sights ▸ Wikipedia articles (New!) ▸ Words that often appear near open sights ▸ Rhymes of open sights ▸ Invented words related to open sights