colonial āļāļ·āļāļāļ°āđāļĢ colonial āļāļ·āļāļāļ°āđāļĢ Of, relating to, possessing, or inhabiting a colony or colonies.Of or relating to the 13 British colonies that became the original United States of America.Of or relating to the colonial period in the United States.Of, relating to, or being a style of architecture and furniture prevalent in the American colonies just before and during the Revolution.Living in, consisting of, or forming a colony: colonial organisms. An inhabitant of a colony.A house designed in an architectural style reminiscent of the one prevalent in the American colonies just before and during the Revolution.