Definition of frost

• v. i. - The act of freezing; -- applied chiefly to the congelation of water; congelation of fluids.
• v. i. - The state or temperature of the air which occasions congelation, or the freezing of water; severe cold or freezing weather.
• v. i. - Frozen dew; -- called also hoarfrost or white frost.
• v. i. - Coldness or insensibility; severity or rigidity of character.
• v. t. - To injure by frost; to freeze, as plants.
• v. t. - To cover with hoarfrost; to produce a surface resembling frost upon, as upon cake, metals, or glass.
• v. t. - To roughen or sharpen, as the nail heads or calks of horseshoes, so as to fit them for frosty weather.