Definition of costless in English:

costless

See synonyms for costless on Thesaurus.com

adjective

  • Without cost, free of charge; involving no loss or sacrifice.

Pronunciation

costless

/ˈkɒstləs/ /ˈkɔːstləs/

Origin

Early 16th century; earliest use found in Alexander Barclay (c1484–1552), poet and clergyman. From cost + -less.