1. noun /ˈkæp.ɪ.təl/
a) Already-produced durable goods available for use as a factor of production, such as steam shovels (equipment) and office buildings (structures).
He does not have enough capital to start a business.
Washington D.C. is the capital of the United States of America.
Ant: minuscule
2. adjective /ˈkæp.ɪ.təl/
That is a capital idea!
b) excellent
Not all felonies are capital crimes.
Ant: lower-case
Wikipedia foundation.