Stubbornly persistent, generally in wrongdoing; refusing to reform or repent.
Hardened against feeling; hard-hearted.
Refusing to move or to change one's opinion; obstinate; firmly resisting; persistent in doing something.
Of materials: physically stiff and inflexible; not easily melted or worked.
Stubbornness.
A disease of citrus trees characterized by stunted growth and misshapen fruit, caused by Spiroplasma citri.