What is the meaning of Adamant?

Firm; unshakeable; unyielding; determined.

Very difficult to break, pierce, or cut.

An unspecified mineral or rock of virtually impenetrable hardness.

1. In later use: diamond.
2. In later use: a lodestone.
3. A substance that neutralizes lodestones.

In later use: diamond.

In later use: a lodestone.

A substance that neutralizes lodestones.

1. 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.

   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.

   A person or thing having the quality of attracting or drawing; a lodestone, a magnet.

   The mineral, diamond

   A gemstone made from diamond.

   alternative form of adhmaint (“adamant, lodestone; magnet”)

   third-person plural present active indicative of adamō

   adamant, adamantine (valuable gemstone)

   An invulnerable or indomitable object

   A natural magnet; magnetite.

   adamant; diamond

   lodestone; magnet

   adamant (an unspecified mineral or rock of virtually impenetrable hardness)

   diamond

   diamond

   Source: wiktionary.org