A numerical value representing the quantity of forty.

चालीस

English Usage: There are 40 students in the class.

Hindi Usage: कक्षा में 40 छात्र हैं।

Referring to something or someone that is forty years old.

चालीस साल पुराना

English Usage: She is a forty-year-old teacher.

Hindi Usage: वह चालीस साल पुरानी शिक्षिका है।