We found 2 dictionaries that define the word upper sides:

General (2 matching dictionaries)

1. upper sides: Vocabulary.com
2. upper sides: Wiktionary

(Note: See upper_side as well.)

Definitions from Wiktionary (upper side) ▸ noun:  The uppermost side of anything ▸ Also see upper_side ▸ Words similar to upper sides ▸ Usage examples for upper sides ▸ Idioms related to upper sides ▸ Wikipedia articles (New!) ▸ Words that often appear near upper sides ▸ Rhymes of upper sides ▸ Invented words related to upper sides