We found 2 dictionaries that define the word unimportances:

General (2 matching dictionaries)

1. unimportances: Merriam-Webster
2. unimportances: Vocabulary.com

(Note: See unimportance as well.)

Definitions from Wiktionary (unimportance) ▸ noun:  Lack of importance. ▸ Also see unimportance ▸ Words similar to unimportances ▸ Usage examples for unimportances ▸ Idioms related to unimportances ▸ Wikipedia articles (New!) ▸ Popular adjectives describing unimportances ▸ Words that often appear near unimportances ▸ Rhymes of unimportances ▸ Invented words related to unimportances