We found 18 dictionaries that define the word sustainment:

General (15 matching dictionaries)

1. sustainment: Merriam-Webster
2. sustainment: Oxford Learner's Dictionaries
3. sustainment: Collins English Dictionary
4. sustainment: Vocabulary.com
5. Sustainment, sustainment: Wordnik
6. sustainment: Wiktionary
7. sustainment: Dictionary.com
8. Sustainment (United States military), Sustainment (military), Sustainment: Wikipedia, the Free Encyclopedia
9. Sustainment: Online Plain Text English Dictionary
10. sustainment: Webster's Revised Unabridged, 1913 Edition
11. sustainment: Rhymezone
12. Sustainment: AllWords.com Multi-Lingual Dictionary
13. sustainment: FreeDictionary.org
14. sustainment: Mnemonic Dictionary
15. sustainment: TheFreeDictionary.com

Business (1 matching dictionary)

16. sustainment: Legal dictionary

Computing (1 matching dictionary)

17. sustainment: Encyclopedia

Tech (1 matching dictionary)

18. DOD Dictionary of Military Terms (No longer online)

(Note: See sustainments as well.)

Definitions from Wiktionary (sustainment) ▸ noun:  The act of sustaining something. Similar: sustentation, sustenance, maintenance, upkeep, sustenation, sustention, maintaining, upholding, life support, supportation, more... Opposite: depletion, exhaustion, consumption Types: logistics, asset management, contract management, more... Phrases: 77th Sustainment Brigade, Under Secretary of Defense for Acquisition and Sustainment, United States Army Sustainment Command, Sustainment Brigades in the United States Army, more... Adjectives: inner, self, term, full, mutual, immense, partial, such, spiritual, logistical, moral ▸ Words similar to sustainment ▸ Usage examples for sustainment ▸ Idioms related to sustainment ▸ Wikipedia articles (New!) ▸ Popular adjectives describing sustainment ▸ Words that often appear near sustainment ▸ Rhymes of sustainment ▸ Invented words related to sustainment