We found one dictionary that defines the word vertical surfaces:

General (1 matching dictionary)

1. vertical surfaces: Vocabulary.com

(Note: See vertical_surface as well.)

Definitions from WordNet (vertical surface) ▸ noun:  a surface that is vertical ▸ Also see vertical_surface ▸ Words similar to vertical surfaces ▸ Usage examples for vertical surfaces ▸ Idioms related to vertical surfaces ▸ Wikipedia articles (New!) ▸ Words that often appear near vertical surfaces ▸ Rhymes of vertical surfaces ▸ Invented words related to vertical surfaces