1. One beyond cure.

2. That cannot be cured; irremediable.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• incabable,
• uncurable,
• insureable,
• increable,
• incureable,
• incurrable,
• increble,
• inccuraable,
• uncureable,
• uncurrable,
• uncurble,
• incurible,
• incrible,
• incable,
• inculable,
• inurable,
• incuurable,
• incerable,
• incureble,
• incureably

• incurrence,
• incurability,
• inaugurate,
• incurably,
• in circles,
• inaccurately,
• inaccurate,
• incursive,
• inscribe,
• inexorably,
• inaccuracy,
• ingrain,
• inquire,
• inocor,
• inquirer,
• ingrained,
• insurance,
• inscrutable,
• inaugural,
• inscribed,
• incurvate,
• Inghram,
• Insurable,
• inquiry,
• insurer,
• inexorable,
• Ingram,
• ingraft,
• ingrate,
• inaugurally,
• incurved.

The adjective form of the word "incurable" is "incurable". The word itself functions as both a noun and an adjective.

The plural of the "incurable" can be the "incurables".

The singular of the "incurable" can be the "incurable".