Definition of columbias:
(n) :
District of Columbia. The federal capital region of the United States of America, including Washington, D.C.
(n) :
(poetic) America; the United States; an appellation given in honor of Christopher Columbus.
(n) :
(dated) A female personification of the United States.
(n) :
A river in British Columbia, Canada and in Washington and Oregon, United States, flowing from the Canadian Rockies to the Pacific Ocean.
(n) :
Columbia University.
(n) :
Columbia Pictures, a major American film production corporation