adamant /ˈæd.ə.mənt/noun 6adjective 2forms 3 noun6 •An unspecified mineral or rock of virtually impenetrable hardness.As an adamant harder than flint have I made thy forehead […] — 1611 •(literary, historical) In later use: diamond. •(figurative) Chiefly in of adamant: an embodiment of impenetrable hardness; the quality of not being easily destroyed or overcome; impenetrableness, imperviousness, impregnableness; also, of a person: the quality of not being easily affected emotionally; impassiveness, unmovableness.Actual life might seem to her so real that she could not detect the union of shadow and adamant that men call poetry. — 1907 •A substance that neutralizes lodestones.An Adamant hinders the attractive vertue, as also Garlick rubbed on the Magnet; for its attractive faculty is not so valid, but it may be easily deluded, obscured, and superated […] — 1657 •(literary, no longer used) In later use: a lodestone.You draw me, you hard-hearted adamant: / But yet you draw not iron, for all my heart / Is true as steel. Leave you your power to draw, / And I shall have no power to follow you. — 1595 •(figurative, no longer used) A person or thing having the quality of attracting or drawing; a lodestone, a magnet. adjective2 •Firm; unshakeable; unyielding; determined.Broiles and Kirkley were adamant about getting out of the lawsuit, but Mike and Dee were equally adamant about not wanting to sign a letter of apology — 2002 •Very difficult to break, pierce, or cut.Unprotected matter, however adamant, would have been ground to dust ages ago. — 1956 formsadamants · more adamant · most adamant