variants: or less commonly inter-colonial
Definition of intercolonial
1 : occurring or existing between two or more colonies intercolonial trade/travel nearly resulted in bringing about an intercolonial war between Pennsylvania and Virginia.— Theodore Roosevelt
2 : of, relating to, or constituting a group or association having members in two or more colonies The actions of this intercolonial legislature would be subject to the veto of the British government— Henry W. Bragdon et al.
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