We found 20 dictionaries that define the word costless:

General (14 matching dictionaries)

1. costless: Merriam-Webster.com
2. costless: Collins English Dictionary
3. costless: Vocabulary.com
4. Costless, costless: Wordnik
5. costless: Wiktionary
6. Costless, costless: Dictionary.com
7. Costless: Online Plain Text English Dictionary
8. costless: Webster's Revised Unabridged, 1913 Edition
9. costless: Rhymezone
10. Costless: AllWords.com Multi-Lingual Dictionary
11. costless: Webster's 1828 Dictionary
12. costless: Free Dictionary
13. costless: Mnemonic Dictionary
14. Costless: Dictionary/thesaurus

Business (2 matching dictionaries)

15. costless: Legal dictionary
16. costless: Financial dictionary

Computing (1 matching dictionary)

17. costless: Encyclopedia

Medicine (1 matching dictionary)

18. costless: Medical dictionary

Miscellaneous (1 matching dictionary)

19. costless: Idioms

Slang (1 matching dictionary)

20. Costless: Urban Dictionary

(Note: See cost as well.)

Definitions from Wiktionary (costless) ▸ adjective:  Having no cost, or at least no cost paid for at the point of sale. Similar: gratis, gratuitous, free, unpaid, complimentary, expenseless, feeless, loadless, chargeless, codeless, more... Opposite: costly, expensive, pricey, high-priced Phrases: make costless, more... ▸ Words similar to costless ▸ Usage examples for costless ▸ Idioms related to costless ▸ Wikipedia articles (New!) ▸ Popular nouns described by costless ▸ Words that often appear near costless ▸ Rhymes of costless ▸ Invented words related to costless