open door

noun

1

: a recognized right of admittance : freedom of access

also : a policy providing such freedom

2

: a policy giving opportunity for commercial relations with a country to all nations on equal terms

open-door

ˈō-pən-ˈdȯr 

adjective

Word History

First Known Use

1526, in the meaning defined at sense 1

Kids Definition

open door

noun

: a policy of giving equal opportunity for trade to all nations

open-door adjective