Adjective adamant has 1 sense
- adamant, adamantine, inexorable, intransigent - not capable of being swayed or diverted from a course; unsusceptible to persuasion; "he is adamant in his refusal to change his mind"; "Cynthia was inexorable; she would have none of him"- W.Churchill; "an intransigent conservative opposed to every liberal tendancy"
Antonym: flexible (indirect, via inflexible)
,
Noun adamant has 1 sense
- diamond, adamant - very hard native crystalline carbon valued as a gem
--1 is a kind of carbon, C, atomic number 6; transparent gem
--1 has particulars: carbonado, black diamond
,