We found 12 dictionaries that define the word unknowns:

General (9 matching dictionaries)

1. unknowns: Merriam-Webster
2. unknowns: Collins English Dictionary
3. unknowns: Vocabulary.com
4. Unknowns, unknown's, unknowns: Wordnik
5. Unknowns, unknowns: Wiktionary
6. unknowns: Dictionary.com
7. unknowns: Cambridge Essential American English Dictionary
8. The Unknowns, Unknowns: Wikipedia, the Free Encyclopedia
9. Unknowns: TheFreeDictionary.com

Business (1 matching dictionary)

10. Unknowns: Legal dictionary

Computing (1 matching dictionary)

11. Unknowns: Encyclopedia

Miscellaneous (1 matching dictionary)

12. Unknowns: Idioms

(Note: See unknown as well.)

Definitions from Wiktionary (Unknowns) ▸ noun:  (US) Those US military personnel who have died in service, usually in war, without proper burial. Similar: unbeknownst, unfamiliar, nameless, Anonymous, unknown quantity, unidentified, unheard-of, unknowable, terra incognita, strange, more... Opposite: knowns, familiar, recognized, identified Types: x-factors, wild cards, unknown unknowns, black swans, more... Phrases: unknown unknowns, known unknowns, tomb of the unknowns, more... ▸ Words similar to unknowns ▸ Usage examples for unknowns ▸ Idioms related to unknowns ▸ Wikipedia articles (New!) ▸ Popular adjectives describing unknowns ▸ Words that often appear near unknowns ▸ Rhymes of unknowns ▸ Invented words related to unknowns